diff --git a/src/main/java/com/raoulvdberge/refinedstorage/RSUtils.java b/src/main/java/com/raoulvdberge/refinedstorage/RSUtils.java
index 294878730..a5b59e527 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/RSUtils.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/RSUtils.java
@@ -31,6 +31,9 @@ import net.minecraft.util.math.AxisAlignedBB;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.RayTraceResult;
 import net.minecraft.util.math.Vec3d;
+import net.minecraft.util.text.Style;
+import net.minecraft.util.text.TextComponentTranslation;
+import net.minecraft.util.text.TextFormatting;
 import net.minecraftforge.common.util.Constants;
 import net.minecraftforge.fluids.Fluid;
 import net.minecraftforge.fluids.FluidRegistry;
@@ -299,6 +302,10 @@ public final class RSUtils {
         return stack == null ? null : stack.copy();
     }
 
+    public static void sendNoPermissionMessage(EntityPlayer player) {
+        player.sendMessage(new TextComponentTranslation("misc.refinedstorage:security.no_permission").setStyle(new Style().setColor(TextFormatting.RED)));
+    }
+
     public static String formatQuantity(int qty) {
         if (qty >= 1000000) {
             return QUANTITY_FORMATTER.format((float) qty / 1000000F) + "M";
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/api/network/INetworkMaster.java b/src/main/java/com/raoulvdberge/refinedstorage/api/network/INetworkMaster.java
index fe9e9b783..7fe7009ac 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/api/network/INetworkMaster.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/api/network/INetworkMaster.java
@@ -9,6 +9,7 @@ import com.raoulvdberge.refinedstorage.api.network.readerwriter.IReaderWriterCha
 import com.raoulvdberge.refinedstorage.api.storage.IStorageCache;
 import com.raoulvdberge.refinedstorage.api.util.IComparer;
 import com.raoulvdberge.refinedstorage.apiimpl.API;
+import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.item.ItemStack;
 import net.minecraft.util.math.BlockPos;
@@ -38,6 +39,13 @@ public interface INetworkMaster {
      */
     boolean canRun();
 
+    /**
+     * @param permission the permission to check for
+     * @param player     the player to check that permission for
+     * @return whether the player has the given permission
+     */
+    boolean hasPermission(Permission permission, EntityPlayer player);
+
     /**
      * @return a graph of connected nodes to this network
      */
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/api/network/Permission.java b/src/main/java/com/raoulvdberge/refinedstorage/api/network/Permission.java
new file mode 100755
index 000000000..3fe7dbf01
--- /dev/null
+++ b/src/main/java/com/raoulvdberge/refinedstorage/api/network/Permission.java
@@ -0,0 +1,27 @@
+package com.raoulvdberge.refinedstorage.api.network;
+
+/**
+ * The various permissions a player can have in a network.
+ */
+public enum Permission {
+    /**
+     * Whether the player can insert items in a network.
+     */
+    INSERT,
+    /**
+     * Whether the player can extract items from a network.
+     */
+    EXTRACT,
+    /**
+     * Whether the player can start, cancel or view an autocrafting task.
+     */
+    AUTOCRAFT,
+    /**
+     * Whether the player can open network GUIs and can place or break network blocks.
+     */
+    MODIFY,
+    /**
+     * Whether the player can manage the security options for a network.
+     */
+    SECURITY
+}
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/api/network/grid/IItemGridHandler.java b/src/main/java/com/raoulvdberge/refinedstorage/api/network/grid/IItemGridHandler.java
index 4a838d9ad..834b093a9 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/api/network/grid/IItemGridHandler.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/api/network/grid/IItemGridHandler.java
@@ -52,10 +52,11 @@ public interface IItemGridHandler {
     /**
      * Called when a player requested crafting for an item.
      *
+     * @param player   the player that is requesting the crafting
      * @param stack    the {@link ItemStack} to request a craft for
      * @param quantity the amount of that item that has to be crafted
      */
-    void onCraftingRequested(ItemStack stack, int quantity);
+    void onCraftingRequested(EntityPlayerMP player, ItemStack stack, int quantity);
 
     /**
      * Called when a player wants to cancel a crafting task.
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/api/network/item/INetworkItemProvider.java b/src/main/java/com/raoulvdberge/refinedstorage/api/network/item/INetworkItemProvider.java
index e39a6b548..7c87a7b5f 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/api/network/item/INetworkItemProvider.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/api/network/item/INetworkItemProvider.java
@@ -10,7 +10,7 @@ public interface INetworkItemProvider {
     /**
      * Creates a network item for the given item stack.
      *
-     * @param handler the network item handlelr
+     * @param handler the network item handler
      * @param player  the player
      * @param stack   the stack
      * @return the network item
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkListener.java b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkListener.java
new file mode 100755
index 000000000..c94e871bd
--- /dev/null
+++ b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkListener.java
@@ -0,0 +1,53 @@
+package com.raoulvdberge.refinedstorage.apiimpl.network;
+
+import com.raoulvdberge.refinedstorage.RSUtils;
+import com.raoulvdberge.refinedstorage.api.network.INetworkNode;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
+import com.raoulvdberge.refinedstorage.proxy.CapabilityNetworkNode;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.EnumFacing;
+import net.minecraftforge.event.world.BlockEvent;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+
+public class NetworkListener {
+    @SubscribeEvent
+    public void onBlockPlace(BlockEvent.PlaceEvent e) {
+        if (!e.getWorld().isRemote) {
+            for (EnumFacing facing : EnumFacing.VALUES) {
+                TileEntity tile = e.getWorld().getTileEntity(e.getBlockSnapshot().getPos().offset(facing));
+
+                if (tile != null && tile.hasCapability(CapabilityNetworkNode.NETWORK_NODE_CAPABILITY, facing.getOpposite())) {
+                    INetworkNode node = tile.getCapability(CapabilityNetworkNode.NETWORK_NODE_CAPABILITY, facing.getOpposite());
+
+                    if (node.getNetwork() != null && !node.getNetwork().hasPermission(Permission.MODIFY, e.getPlayer())) {
+                        RSUtils.sendNoPermissionMessage(e.getPlayer());
+
+                        e.setCanceled(true);
+
+                        return;
+                    }
+                }
+            }
+        }
+    }
+
+    @SubscribeEvent
+    public void onBlockBreak(BlockEvent.BreakEvent e) {
+        if (!e.getWorld().isRemote) {
+            TileEntity tile = e.getWorld().getTileEntity(e.getPos());
+
+            if (tile != null && tile.hasCapability(CapabilityNetworkNode.NETWORK_NODE_CAPABILITY, null)) {
+
+                INetworkNode node = tile.getCapability(CapabilityNetworkNode.NETWORK_NODE_CAPABILITY, null);
+
+                if (node.getNetwork() != null && !node.getNetwork().hasPermission(Permission.MODIFY, e.getPlayer())) {
+                    RSUtils.sendNoPermissionMessage(e.getPlayer());
+
+                    e.setCanceled(true);
+
+                    return;
+                }
+            }
+        }
+    }
+}
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/grid/ItemGridHandler.java b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/grid/ItemGridHandler.java
index 80dc31ece..a9a1e6eaf 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/grid/ItemGridHandler.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/grid/ItemGridHandler.java
@@ -5,6 +5,7 @@ import com.raoulvdberge.refinedstorage.RSUtils;
 import com.raoulvdberge.refinedstorage.api.autocrafting.ICraftingPattern;
 import com.raoulvdberge.refinedstorage.api.autocrafting.task.ICraftingTask;
 import com.raoulvdberge.refinedstorage.api.network.INetworkMaster;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.api.network.grid.IItemGridHandler;
 import com.raoulvdberge.refinedstorage.api.network.item.INetworkItem;
 import com.raoulvdberge.refinedstorage.api.util.IStackList;
@@ -31,7 +32,7 @@ public class ItemGridHandler implements IItemGridHandler {
     public void onExtract(int hash, int flags, EntityPlayerMP player) {
         ItemStack item = network.getItemStorageCache().getList().get(hash);
 
-        if (item == null) {
+        if (item == null || !network.hasPermission(Permission.EXTRACT, player)) {
             return;
         }
 
@@ -99,6 +100,10 @@ public class ItemGridHandler implements IItemGridHandler {
 
     @Override
     public ItemStack onInsert(EntityPlayerMP player, ItemStack stack) {
+        if (!network.hasPermission(Permission.INSERT, player)) {
+            return stack;
+        }
+
         ItemStack remainder = network.insertItem(stack, stack.getCount(), false);
 
         INetworkItem networkItem = network.getNetworkItemHandler().getItem(player);
@@ -112,7 +117,7 @@ public class ItemGridHandler implements IItemGridHandler {
 
     @Override
     public void onInsertHeldItem(EntityPlayerMP player, boolean single) {
-        if (player.inventory.getItemStack().isEmpty()) {
+        if (player.inventory.getItemStack().isEmpty() || !network.hasPermission(Permission.INSERT, player)) {
             return;
         }
 
@@ -144,6 +149,10 @@ public class ItemGridHandler implements IItemGridHandler {
 
     @Override
     public void onCraftingPreviewRequested(EntityPlayerMP player, int hash, int quantity) {
+        if (!network.hasPermission(Permission.AUTOCRAFT, player)) {
+            return;
+        }
+
         IStackList<ItemStack> cache = API.instance().createItemStackList();
 
         for (ICraftingPattern pattern : network.getPatterns()) {
@@ -170,8 +179,8 @@ public class ItemGridHandler implements IItemGridHandler {
     }
 
     @Override
-    public void onCraftingRequested(ItemStack stack, int quantity) {
-        if (quantity <= 0) {
+    public void onCraftingRequested(EntityPlayerMP player, ItemStack stack, int quantity) {
+        if (quantity <= 0 || !network.hasPermission(Permission.AUTOCRAFT, player)) {
             return;
         }
 
@@ -188,6 +197,10 @@ public class ItemGridHandler implements IItemGridHandler {
 
     @Override
     public void onCraftingCancelRequested(EntityPlayerMP player, int id) {
+        if (!network.hasPermission(Permission.AUTOCRAFT, player)) {
+            return;
+        }
+
         if (id >= 0 && id < network.getCraftingTasks().size()) {
             network.cancelCraftingTask(network.getCraftingTasks().get(id));
         } else if (id == -1) {
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/item/NetworkItemWirelessCraftingMonitor.java b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/item/NetworkItemWirelessCraftingMonitor.java
index 5759db6f9..5e83662e7 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/item/NetworkItemWirelessCraftingMonitor.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/item/NetworkItemWirelessCraftingMonitor.java
@@ -2,7 +2,9 @@ package com.raoulvdberge.refinedstorage.apiimpl.network.item;
 
 import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
+import com.raoulvdberge.refinedstorage.RSUtils;
 import com.raoulvdberge.refinedstorage.api.network.INetworkMaster;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.api.network.item.INetworkItem;
 import com.raoulvdberge.refinedstorage.api.network.item.INetworkItemHandler;
 import com.raoulvdberge.refinedstorage.item.ItemWirelessCraftingMonitor;
@@ -36,6 +38,12 @@ public class NetworkItemWirelessCraftingMonitor implements INetworkItem {
             return false;
         }
 
+        if (!network.hasPermission(Permission.AUTOCRAFT, player)) {
+            RSUtils.sendNoPermissionMessage(player);
+
+            return false;
+        }
+
         player.openGui(RS.INSTANCE, RSGui.WIRELESS_CRAFTING_MONITOR, player.getEntityWorld(), hand.ordinal(), controllerWorld.provider.getDimension(), 0);
 
         network.sendCraftingMonitorUpdate((EntityPlayerMP) player);
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/item/NetworkItemWirelessGrid.java b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/item/NetworkItemWirelessGrid.java
index 66656fadf..a8049f7ad 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/item/NetworkItemWirelessGrid.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/item/NetworkItemWirelessGrid.java
@@ -2,7 +2,9 @@ package com.raoulvdberge.refinedstorage.apiimpl.network.item;
 
 import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
+import com.raoulvdberge.refinedstorage.RSUtils;
 import com.raoulvdberge.refinedstorage.api.network.INetworkMaster;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.api.network.item.INetworkItem;
 import com.raoulvdberge.refinedstorage.api.network.item.INetworkItemHandler;
 import com.raoulvdberge.refinedstorage.item.ItemWirelessGrid;
@@ -36,6 +38,12 @@ public class NetworkItemWirelessGrid implements INetworkItem {
             return false;
         }
 
+        if (!network.hasPermission(Permission.MODIFY, player)) {
+            RSUtils.sendNoPermissionMessage(player);
+
+            return false;
+        }
+
         player.openGui(RS.INSTANCE, RSGui.WIRELESS_GRID, player.getEntityWorld(), hand.ordinal(), controllerWorld.provider.getDimension(), 0);
 
         network.sendItemStorageToClient((EntityPlayerMP) player);
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockBase.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockBase.java
index 10836d35d..a0a0e5445 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockBase.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockBase.java
@@ -1,7 +1,11 @@
 package com.raoulvdberge.refinedstorage.block;
 
 import com.raoulvdberge.refinedstorage.RS;
+import com.raoulvdberge.refinedstorage.RSUtils;
+import com.raoulvdberge.refinedstorage.api.network.INetworkNode;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.item.ItemBlockBase;
+import com.raoulvdberge.refinedstorage.proxy.CapabilityNetworkNode;
 import com.raoulvdberge.refinedstorage.tile.TileBase;
 import net.minecraft.block.Block;
 import net.minecraft.block.material.Material;
@@ -128,6 +132,32 @@ public abstract class BlockBase extends Block {
         world.setBlockToAir(pos);
     }
 
+    protected boolean tryOpenNetworkGui(int guiId, EntityPlayer player, World world, BlockPos pos, EnumFacing facing) {
+        return tryOpenNetworkGui(guiId, player, world, pos, facing, Permission.MODIFY);
+    }
+
+    protected boolean tryOpenNetworkGui(int guiId, EntityPlayer player, World world, BlockPos pos, EnumFacing facing, Permission... permissions) {
+        TileEntity tile = world.getTileEntity(pos);
+
+        if (tile != null && tile.hasCapability(CapabilityNetworkNode.NETWORK_NODE_CAPABILITY, facing)) {
+            INetworkNode node = CapabilityNetworkNode.NETWORK_NODE_CAPABILITY.cast(tile.getCapability(CapabilityNetworkNode.NETWORK_NODE_CAPABILITY, facing));
+
+            if (node.getNetwork() != null) {
+                for (Permission permission : permissions) {
+                    if (!node.getNetwork().hasPermission(permission, player)) {
+                        RSUtils.sendNoPermissionMessage(player);
+
+                        return false;
+                    }
+                }
+            }
+        }
+
+        player.openGui(RS.INSTANCE, guiId, world, pos.getX(), pos.getY(), pos.getZ());
+
+        return true;
+    }
+
     public EnumPlacementType getPlacementType() {
         return EnumPlacementType.HORIZONTAL;
     }
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockConstructor.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockConstructor.java
index 772fe7414..f6e930911 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockConstructor.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockConstructor.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileConstructor;
 import net.minecraft.block.state.IBlockState;
@@ -80,7 +79,7 @@ public class BlockConstructor extends BlockCable {
         }
 
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.CONSTRUCTOR, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.CONSTRUCTOR, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockController.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockController.java
index 8cc54f56a..2e6dcbd79 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockController.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockController.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSBlocks;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.item.ItemBlockController;
@@ -79,7 +78,7 @@ public class BlockController extends BlockBase {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.CONTROLLER, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.CONTROLLER, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockCrafter.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockCrafter.java
index 6c2a799d3..fc4a0077b 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockCrafter.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockCrafter.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileCrafter;
 import net.minecraft.block.state.IBlockState;
@@ -24,7 +23,7 @@ public class BlockCrafter extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.CRAFTER, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.CRAFTER, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockCraftingMonitor.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockCraftingMonitor.java
index 4876e7595..ee39bac93 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockCraftingMonitor.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockCraftingMonitor.java
@@ -1,7 +1,7 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.tile.craftingmonitor.TileCraftingMonitor;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.entity.player.EntityPlayer;
@@ -23,9 +23,7 @@ public class BlockCraftingMonitor extends BlockNode {
 
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
-        if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.CRAFTING_MONITOR, world, pos.getX(), pos.getY(), pos.getZ());
-
+        if (!world.isRemote && tryOpenNetworkGui(RSGui.CRAFTING_MONITOR, player, world, pos, side, Permission.MODIFY, Permission.AUTOCRAFT)) {
             ((TileCraftingMonitor) world.getTileEntity(pos)).onOpened(player);
         }
 
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDestructor.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDestructor.java
index 782dbcdf2..a443f4f7a 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDestructor.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDestructor.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSBlocks;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileDestructor;
@@ -37,7 +36,7 @@ public class BlockDestructor extends BlockCable {
         }
 
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.DESTRUCTOR, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.DESTRUCTOR, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDetector.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDetector.java
index 91f522f40..078ada55d 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDetector.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDetector.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileDetector;
 import net.minecraft.block.properties.PropertyBool;
@@ -70,7 +69,7 @@ public class BlockDetector extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.DETECTOR, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.DETECTOR, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDiskDrive.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDiskDrive.java
index afccff2ba..b33216c5d 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDiskDrive.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDiskDrive.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.render.PropertyObject;
 import com.raoulvdberge.refinedstorage.tile.TileDiskDrive;
@@ -30,7 +29,7 @@ public class BlockDiskDrive extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.DISK_DRIVE, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.DISK_DRIVE, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDiskManipulator.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDiskManipulator.java
index 15980437d..d763475d5 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDiskManipulator.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockDiskManipulator.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.render.PropertyObject;
 import com.raoulvdberge.refinedstorage.tile.TileDiskManipulator;
@@ -30,7 +29,7 @@ public class BlockDiskManipulator extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.DISK_MANIPULATOR, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.DISK_MANIPULATOR, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockExporter.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockExporter.java
index b53a65b7c..00e9e4110 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockExporter.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockExporter.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileExporter;
 import net.minecraft.block.state.IBlockState;
@@ -91,7 +90,7 @@ public class BlockExporter extends BlockCable {
         }
 
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.EXPORTER, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.EXPORTER, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockExternalStorage.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockExternalStorage.java
index 1dec26d85..b7ff7b8c0 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockExternalStorage.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockExternalStorage.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.externalstorage.TileExternalStorage;
 import net.minecraft.block.Block;
@@ -74,7 +73,7 @@ public class BlockExternalStorage extends BlockCable {
         }
 
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.EXTERNAL_STORAGE, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.EXTERNAL_STORAGE, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockFluidInterface.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockFluidInterface.java
index e3b6e2a0a..102b98bc0 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockFluidInterface.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockFluidInterface.java
@@ -1,7 +1,7 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.tile.TileFluidInterface;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.entity.player.EntityPlayer;
@@ -24,7 +24,7 @@ public class BlockFluidInterface extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.FLUID_INTERFACE, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.FLUID_INTERFACE, player, world, pos, side, Permission.MODIFY, Permission.INSERT, Permission.EXTRACT);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockFluidStorage.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockFluidStorage.java
index ae02e494a..62bd9d178 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockFluidStorage.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockFluidStorage.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSBlocks;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.item.ItemBlockFluidStorage;
@@ -66,7 +65,7 @@ public class BlockFluidStorage extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.FLUID_STORAGE, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.FLUID_STORAGE, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockGrid.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockGrid.java
index 4eaf36412..e1f1171c6 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockGrid.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockGrid.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.item.ItemBlockBase;
 import com.raoulvdberge.refinedstorage.tile.grid.TileGrid;
@@ -56,9 +55,7 @@ public class BlockGrid extends BlockNode {
 
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
-        if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.GRID, world, pos.getX(), pos.getY(), pos.getZ());
-
+        if (!world.isRemote && tryOpenNetworkGui(RSGui.GRID, player, world, pos, side)) {
             ((TileGrid) world.getTileEntity(pos)).onOpened(player);
         }
 
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockImporter.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockImporter.java
index 2998dac53..eb4b871a0 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockImporter.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockImporter.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileImporter;
 import net.minecraft.block.state.IBlockState;
@@ -91,7 +90,7 @@ public class BlockImporter extends BlockCable {
         }
 
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.IMPORTER, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.IMPORTER, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockInterface.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockInterface.java
index 0375c0624..5388a9af0 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockInterface.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockInterface.java
@@ -1,7 +1,7 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.tile.TileInterface;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.entity.player.EntityPlayer;
@@ -24,7 +24,7 @@ public class BlockInterface extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.INTERFACE, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.INTERFACE, player, world, pos, side, Permission.MODIFY, Permission.INSERT, Permission.EXTRACT);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockNetworkTransmitter.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockNetworkTransmitter.java
index 2c9cbe8d6..05d93d13d 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockNetworkTransmitter.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockNetworkTransmitter.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileNetworkTransmitter;
 import net.minecraft.block.state.IBlockState;
@@ -19,7 +18,7 @@ public class BlockNetworkTransmitter extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.NETWORK_TRANSMITTER, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.NETWORK_TRANSMITTER, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockReader.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockReader.java
index 2fdf7144e..4e3c24bb5 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockReader.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockReader.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSBlocks;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileReader;
@@ -32,9 +31,7 @@ public class BlockReader extends BlockCable {
             return false;
         }
 
-        if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.READER_WRITER, world, pos.getX(), pos.getY(), pos.getZ());
-
+        if (!world.isRemote && tryOpenNetworkGui(RSGui.READER_WRITER, player, world, pos, side)) {
             ((TileReader) world.getTileEntity(pos)).onOpened(player);
         }
 
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockRelay.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockRelay.java
index 1c822edf2..6d96e8ed3 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockRelay.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockRelay.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileRelay;
 import net.minecraft.block.state.IBlockState;
@@ -24,7 +23,7 @@ public class BlockRelay extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.RELAY, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.RELAY, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockSolderer.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockSolderer.java
index 562c97a19..d5aac7908 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockSolderer.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockSolderer.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileSolderer;
 import net.minecraft.block.state.IBlockState;
@@ -46,7 +45,7 @@ public class BlockSolderer extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.SOLDERER, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.SOLDERER, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockStorage.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockStorage.java
index d0fc92fa5..a64ea7b83 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockStorage.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockStorage.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSBlocks;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.item.ItemBlockStorage;
@@ -66,7 +65,7 @@ public class BlockStorage extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.STORAGE, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.STORAGE, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockWirelessTransmitter.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockWirelessTransmitter.java
index e63fd89bd..46b27034f 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockWirelessTransmitter.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockWirelessTransmitter.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileWirelessTransmitter;
 import net.minecraft.block.Block;
@@ -36,7 +35,7 @@ public class BlockWirelessTransmitter extends BlockNode {
     @Override
     public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
         if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.WIRELESS_TRANSMITTER, world, pos.getX(), pos.getY(), pos.getZ());
+            tryOpenNetworkGui(RSGui.WIRELESS_TRANSMITTER, player, world, pos, side);
         }
 
         return true;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockWriter.java b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockWriter.java
index d4f6b0f9f..9a70d7b5f 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/BlockWriter.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/BlockWriter.java
@@ -1,6 +1,5 @@
 package com.raoulvdberge.refinedstorage.block;
 
-import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSBlocks;
 import com.raoulvdberge.refinedstorage.RSGui;
 import com.raoulvdberge.refinedstorage.tile.TileWriter;
@@ -32,9 +31,7 @@ public class BlockWriter extends BlockCable {
             return false;
         }
 
-        if (!world.isRemote) {
-            player.openGui(RS.INSTANCE, RSGui.READER_WRITER, world, pos.getX(), pos.getY(), pos.getZ());
-
+        if (!world.isRemote && tryOpenNetworkGui(RSGui.READER_WRITER, player, world, pos, side)) {
             ((TileWriter) world.getTileEntity(pos)).onOpened(player);
         }
 
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/gui/grid/GuiGrid.java b/src/main/java/com/raoulvdberge/refinedstorage/gui/grid/GuiGrid.java
index 432e3d365..3a469763e 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/gui/grid/GuiGrid.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/gui/grid/GuiGrid.java
@@ -50,6 +50,7 @@ public class GuiGrid extends GuiBase implements IGridDisplay {
     public static final ListMultimap<Fluid, GridStackFluid> FLUIDS = Multimaps.synchronizedListMultimap(ArrayListMultimap.create());
 
     public static List<IGridStack> STACKS = new ArrayList<>();
+    public static boolean CAN_CRAFT;
 
     private static boolean markedForSorting;
 
@@ -515,7 +516,7 @@ public class GuiGrid extends GuiBase implements IGridDisplay {
                 if (grid.getType() != EnumGridType.FLUID && (held.isEmpty() || (!held.isEmpty() && clickedButton == 2))) {
                     GridStackItem stack = (GridStackItem) STACKS.get(slotNumber);
 
-                    if (stack.isCraftable() && (stack.doesDisplayCraftText() || (GuiScreen.isShiftKeyDown() && GuiScreen.isCtrlKeyDown()))) {
+                    if (stack.isCraftable() && (stack.doesDisplayCraftText() || (GuiScreen.isShiftKeyDown() && GuiScreen.isCtrlKeyDown())) && CAN_CRAFT) {
                         FMLCommonHandler.instance().showGuiScreen(new GuiCraftingStart(this, ((ContainerGrid) this.inventorySlots).getPlayer(), stack));
                     } else {
                         int flags = 0;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridCraftingClear.java b/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridCraftingClear.java
index 3035f9c06..c06145a49 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridCraftingClear.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridCraftingClear.java
@@ -1,6 +1,7 @@
 package com.raoulvdberge.refinedstorage.network;
 
 import com.raoulvdberge.refinedstorage.RSUtils;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.block.EnumGridType;
 import com.raoulvdberge.refinedstorage.tile.grid.TileGrid;
 import io.netty.buffer.ByteBuf;
@@ -46,7 +47,7 @@ public class MessageGridCraftingClear extends MessageHandlerPlayerToServer<Messa
             TileGrid grid = (TileGrid) tile;
 
             if (grid.hasNetwork()) {
-                if (grid.getType() == EnumGridType.CRAFTING) {
+                if (grid.getType() == EnumGridType.CRAFTING && grid.getNetwork().hasPermission(Permission.INSERT, player)) {
                     for (int i = 0; i < grid.getMatrix().getSizeInventory(); ++i) {
                         ItemStack slot = grid.getMatrix().getStackInSlot(i);
 
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridCraftingStart.java b/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridCraftingStart.java
index cda58a77b..f508db18f 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridCraftingStart.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridCraftingStart.java
@@ -41,7 +41,7 @@ public class MessageGridCraftingStart extends MessageHandlerPlayerToServer<Messa
             IItemGridHandler handler = ((ContainerGrid) container).getGrid().getItemHandler();
 
             if (handler != null) {
-                handler.onCraftingRequested(message.stack, message.quantity);
+                handler.onCraftingRequested(player, message.stack, message.quantity);
             }
         }
     }
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridFluidUpdate.java b/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridFluidUpdate.java
index a14516655..4df95f3d9 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridFluidUpdate.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridFluidUpdate.java
@@ -15,17 +15,21 @@ import java.util.List;
 
 public class MessageGridFluidUpdate implements IMessage, IMessageHandler<MessageGridFluidUpdate, IMessage> {
     private INetworkMaster network;
+    private boolean canCraft;
     private List<GridStackFluid> stacks = new ArrayList<>();
 
     public MessageGridFluidUpdate() {
     }
 
-    public MessageGridFluidUpdate(INetworkMaster network) {
+    public MessageGridFluidUpdate(INetworkMaster network, boolean canCraft) {
         this.network = network;
+        this.canCraft = canCraft;
     }
 
     @Override
     public void fromBytes(ByteBuf buf) {
+        canCraft = buf.readBoolean();
+
         int items = buf.readInt();
 
         for (int i = 0; i < items; ++i) {
@@ -35,6 +39,8 @@ public class MessageGridFluidUpdate implements IMessage, IMessageHandler<Message
 
     @Override
     public void toBytes(ByteBuf buf) {
+        buf.writeBoolean(canCraft);
+
         buf.writeInt(network.getFluidStorageCache().getList().getStacks().size());
 
         for (FluidStack stack : network.getFluidStorageCache().getList().getStacks()) {
@@ -44,6 +50,8 @@ public class MessageGridFluidUpdate implements IMessage, IMessageHandler<Message
 
     @Override
     public IMessage onMessage(MessageGridFluidUpdate message, MessageContext ctx) {
+        GuiGrid.CAN_CRAFT = message.canCraft;
+
         GuiGrid.FLUIDS.clear();
 
         for (GridStackFluid item : message.stacks) {
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridItemUpdate.java b/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridItemUpdate.java
index 81a7c1e57..d96f8bbbb 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridItemUpdate.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/network/MessageGridItemUpdate.java
@@ -17,17 +17,21 @@ import java.util.List;
 
 public class MessageGridItemUpdate implements IMessage, IMessageHandler<MessageGridItemUpdate, IMessage> {
     private INetworkMaster network;
+    private boolean canCraft;
     private List<GridStackItem> stacks = new ArrayList<>();
 
     public MessageGridItemUpdate() {
     }
 
-    public MessageGridItemUpdate(INetworkMaster network) {
+    public MessageGridItemUpdate(INetworkMaster network, boolean canCraft) {
         this.network = network;
+        this.canCraft = canCraft;
     }
 
     @Override
     public void fromBytes(ByteBuf buf) {
+        canCraft = buf.readBoolean();
+
         int items = buf.readInt();
 
         for (int i = 0; i < items; ++i) {
@@ -37,6 +41,8 @@ public class MessageGridItemUpdate implements IMessage, IMessageHandler<MessageG
 
     @Override
     public void toBytes(ByteBuf buf) {
+        buf.writeBoolean(canCraft);
+
         int size = network.getItemStorageCache().getList().getStacks().size();
 
         for (ICraftingPattern pattern : network.getPatterns()) {
@@ -60,6 +66,8 @@ public class MessageGridItemUpdate implements IMessage, IMessageHandler<MessageG
 
     @Override
     public IMessage onMessage(MessageGridItemUpdate message, MessageContext ctx) {
+        GuiGrid.CAN_CRAFT = message.canCraft;
+
         GuiGrid.ITEMS.clear();
 
         for (GridStackItem item : message.stacks) {
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/proxy/ProxyCommon.java b/src/main/java/com/raoulvdberge/refinedstorage/proxy/ProxyCommon.java
index 2601dec87..2c5df82fb 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/proxy/ProxyCommon.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/proxy/ProxyCommon.java
@@ -9,6 +9,7 @@ import com.raoulvdberge.refinedstorage.apiimpl.autocrafting.craftingmonitor.*;
 import com.raoulvdberge.refinedstorage.apiimpl.autocrafting.preview.CraftingPreviewElementFluidStack;
 import com.raoulvdberge.refinedstorage.apiimpl.autocrafting.preview.CraftingPreviewElementItemStack;
 import com.raoulvdberge.refinedstorage.apiimpl.autocrafting.registry.CraftingTaskFactory;
+import com.raoulvdberge.refinedstorage.apiimpl.network.NetworkListener;
 import com.raoulvdberge.refinedstorage.apiimpl.network.readerwriter.ReaderWriterHandlerFluids;
 import com.raoulvdberge.refinedstorage.apiimpl.network.readerwriter.ReaderWriterHandlerItems;
 import com.raoulvdberge.refinedstorage.apiimpl.network.readerwriter.ReaderWriterHandlerRedstone;
@@ -123,6 +124,7 @@ public class ProxyCommon {
         NetworkRegistry.INSTANCE.registerGuiHandler(RS.INSTANCE, new GuiHandler());
 
         MinecraftForge.EVENT_BUS.register(new ContainerListener());
+        MinecraftForge.EVENT_BUS.register(new NetworkListener());
 
         registerTile(TileController.class, "controller");
         registerTile(TileGrid.class, "grid");
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/tile/TileController.java b/src/main/java/com/raoulvdberge/refinedstorage/tile/TileController.java
index 99da780a7..de186d3cf 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/tile/TileController.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/tile/TileController.java
@@ -14,6 +14,7 @@ import com.raoulvdberge.refinedstorage.api.autocrafting.task.ICraftingTask;
 import com.raoulvdberge.refinedstorage.api.network.INetworkMaster;
 import com.raoulvdberge.refinedstorage.api.network.INetworkNode;
 import com.raoulvdberge.refinedstorage.api.network.INetworkNodeGraph;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.api.network.grid.IFluidGridHandler;
 import com.raoulvdberge.refinedstorage.api.network.grid.IItemGridHandler;
 import com.raoulvdberge.refinedstorage.api.network.item.INetworkItemHandler;
@@ -212,6 +213,11 @@ public class TileController extends TileBase implements INetworkMaster, IRedston
         return energy.getEnergyStored() > 0 && redstoneMode.isEnabled(getWorld(), pos);
     }
 
+    @Override
+    public boolean hasPermission(Permission permission, EntityPlayer player) {
+        return true;
+    }
+
     @Override
     public INetworkNodeGraph getNodeGraph() {
         return nodeGraph;
@@ -466,7 +472,7 @@ public class TileController extends TileBase implements INetworkMaster, IRedston
 
     @Override
     public void sendItemStorageToClient(EntityPlayerMP player) {
-        RS.INSTANCE.network.sendTo(new MessageGridItemUpdate(this), player);
+        RS.INSTANCE.network.sendTo(new MessageGridItemUpdate(this, hasPermission(Permission.AUTOCRAFT, player)), player);
     }
 
     @Override
@@ -485,7 +491,7 @@ public class TileController extends TileBase implements INetworkMaster, IRedston
 
     @Override
     public void sendFluidStorageToClient(EntityPlayerMP player) {
-        RS.INSTANCE.network.sendTo(new MessageGridFluidUpdate(this), player);
+        RS.INSTANCE.network.sendTo(new MessageGridFluidUpdate(this, hasPermission(Permission.AUTOCRAFT, player)), player);
     }
 
     @Override
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/tile/grid/TileGrid.java b/src/main/java/com/raoulvdberge/refinedstorage/tile/grid/TileGrid.java
index f32674a4a..cdde00f5f 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/tile/grid/TileGrid.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/tile/grid/TileGrid.java
@@ -4,6 +4,7 @@ import com.raoulvdberge.refinedstorage.RS;
 import com.raoulvdberge.refinedstorage.RSBlocks;
 import com.raoulvdberge.refinedstorage.RSItems;
 import com.raoulvdberge.refinedstorage.RSUtils;
+import com.raoulvdberge.refinedstorage.api.network.Permission;
 import com.raoulvdberge.refinedstorage.api.network.grid.IFluidGridHandler;
 import com.raoulvdberge.refinedstorage.api.network.grid.IItemGridHandler;
 import com.raoulvdberge.refinedstorage.apiimpl.API;
@@ -387,6 +388,10 @@ public class TileGrid extends TileNode implements IGrid {
     }
 
     public void onRecipeTransfer(EntityPlayer player, ItemStack[][] recipe) {
+        if (hasNetwork() && getType() == EnumGridType.CRAFTING && !network.hasPermission(Permission.EXTRACT, player)) {
+            return;
+        }
+
         // First try to empty the crafting matrix
         for (int i = 0; i < matrix.getSizeInventory(); ++i) {
             ItemStack slot = matrix.getStackInSlot(i);
diff --git a/src/main/resources/assets/refinedstorage/lang/en_US.lang b/src/main/resources/assets/refinedstorage/lang/en_US.lang
index 7116a9f5f..a9aef614d 100755
--- a/src/main/resources/assets/refinedstorage/lang/en_US.lang
+++ b/src/main/resources/assets/refinedstorage/lang/en_US.lang
@@ -78,6 +78,8 @@ misc.refinedstorage:pattern.outputs=Outputs
 misc.refinedstorage:pattern.invalid=Invalid pattern
 misc.refinedstorage:pattern.oredict=Uses ore dictionary
 
+misc.refinedstorage:security.no_permission=You have no permission to perform that action.
+
 misc.refinedstorage:start=Start
 misc.refinedstorage:clear=Clear
 misc.refinedstorage:set=Set