diff --git a/src/main/resources/assets/opencomputers/lang/de_DE.lang b/src/main/resources/assets/opencomputers/lang/de_DE.lang
index 9b02842bf..7d9e90687 100644
--- a/src/main/resources/assets/opencomputers/lang/de_DE.lang
+++ b/src/main/resources/assets/opencomputers/lang/de_DE.lang
@@ -146,6 +146,8 @@ oc:gui.ServerRack.Bottom=Unten
 oc:gui.ServerRack.Left=Links
 oc:gui.ServerRack.Right=Rechts
 oc:gui.ServerRack.Top=Oben
+oc:gui.ServerRack.SwitchExternal=Extern
+oc:gui.ServerRack.SwitchInternal=Intern
 oc:gui.ServerRack.WirelessRange=Reichweite
 oc:gui.Switch.TransferRate=Taktung
 oc:gui.Switch.PacketsPerCycle=Pakete / Zyklus
diff --git a/src/main/resources/assets/opencomputers/lang/en_US.lang b/src/main/resources/assets/opencomputers/lang/en_US.lang
index 1e402f0b5..8fbd9d6be 100644
--- a/src/main/resources/assets/opencomputers/lang/en_US.lang
+++ b/src/main/resources/assets/opencomputers/lang/en_US.lang
@@ -147,6 +147,8 @@ oc:gui.ServerRack.Bottom=Bottom
 oc:gui.ServerRack.Left=Left
 oc:gui.ServerRack.Right=Right
 oc:gui.ServerRack.Top=Top
+oc:gui.ServerRack.SwitchExternal=External
+oc:gui.ServerRack.SwitchInternal=Internal
 oc:gui.ServerRack.WirelessRange=Range
 oc:gui.Switch.TransferRate=Cycle rate
 oc:gui.Switch.PacketsPerCycle=Packets / cycle
diff --git a/src/main/resources/assets/opencomputers/textures/gui/button_switch.png b/src/main/resources/assets/opencomputers/textures/gui/button_switch.png
new file mode 100644
index 000000000..4b88de9f7
Binary files /dev/null and b/src/main/resources/assets/opencomputers/textures/gui/button_switch.png differ
diff --git a/src/main/scala/li/cil/oc/Localization.scala b/src/main/scala/li/cil/oc/Localization.scala
index ac003ea40..0787b0d59 100644
--- a/src/main/scala/li/cil/oc/Localization.scala
+++ b/src/main/scala/li/cil/oc/Localization.scala
@@ -93,6 +93,10 @@ object Localization {
 
     def None = localizeImmediately("gui.ServerRack.None")
 
+    def SwitchExternal = localizeImmediately("gui.ServerRack.SwitchExternal")
+
+    def SwitchInternal = localizeImmediately("gui.ServerRack.SwitchInternal")
+
     def WirelessRange = localizeImmediately("gui.ServerRack.WirelessRange")
   }
 
diff --git a/src/main/scala/li/cil/oc/client/PacketSender.scala b/src/main/scala/li/cil/oc/client/PacketSender.scala
index 4e777a4a8..a6153667a 100644
--- a/src/main/scala/li/cil/oc/client/PacketSender.scala
+++ b/src/main/scala/li/cil/oc/client/PacketSender.scala
@@ -154,4 +154,13 @@ object PacketSender {
 
     pb.sendToServer()
   }
+
+  def sendServerSwitchMode(t: ServerRack, internal: Boolean) {
+    val pb = new PacketBuilder(PacketType.ServerSwitchMode)
+
+    pb.writeTileEntity(t)
+    pb.writeBoolean(internal)
+
+    pb.sendToServer()
+  }
 }
\ No newline at end of file
diff --git a/src/main/scala/li/cil/oc/client/Textures.scala b/src/main/scala/li/cil/oc/client/Textures.scala
index 8301d72b0..5e0ea01d0 100644
--- a/src/main/scala/li/cil/oc/client/Textures.scala
+++ b/src/main/scala/li/cil/oc/client/Textures.scala
@@ -16,6 +16,7 @@ object Textures extends ResourceManagerReloadListener {
   val guiButtonRun = new ResourceLocation(Settings.resourceDomain, "textures/gui/button_run.png")
   val guiButtonScroll = new ResourceLocation(Settings.resourceDomain, "textures/gui/button_scroll.png")
   val guiButtonSide = new ResourceLocation(Settings.resourceDomain, "textures/gui/button_side.png")
+  val guiButtonSwitch = new ResourceLocation(Settings.resourceDomain, "textures/gui/button_switch.png")
   val guiComputer = new ResourceLocation(Settings.resourceDomain, "textures/gui/computer.png")
   val guiDisassembler = new ResourceLocation(Settings.resourceDomain, "textures/gui/disassembler.png")
   val guiKeyboardMissing = new ResourceLocation(Settings.resourceDomain, "textures/gui/keyboard_missing.png")
diff --git a/src/main/scala/li/cil/oc/client/gui/ImageButton.scala b/src/main/scala/li/cil/oc/client/gui/ImageButton.scala
index a6de183be..8f5d9c705 100644
--- a/src/main/scala/li/cil/oc/client/gui/ImageButton.scala
+++ b/src/main/scala/li/cil/oc/client/gui/ImageButton.scala
@@ -13,7 +13,8 @@ class ImageButton(id: Int, x: Int, y: Int, w: Int, h: Int,
                   val canToggle: Boolean = false,
                   val textColor: Int = 0xE0E0E0,
                   val textDisabledColor: Int = 0xA0A0A0,
-                  val textHoverColor: Int = 0xFFFFA0) extends GuiButton(id, x, y, w, h, text) {
+                  val textHoverColor: Int = 0xFFFFA0,
+                  val textIndent: Int = -1) extends GuiButton(id, x, y, w, h, text) {
 
   var toggled = false
 
@@ -48,7 +49,8 @@ class ImageButton(id: Int, x: Int, y: Int, w: Int, h: Int,
           if (!enabled) textDisabledColor
           else if (hoverOverride || field_82253_i) textHoverColor
           else textColor
-        drawCenteredString(mc.fontRenderer, displayString, xPosition + width / 2, yPosition + (height - 8) / 2, color)
+        if (textIndent >= 0) drawString(mc.fontRenderer, displayString, textIndent + xPosition, yPosition + (height - 8) / 2, color)
+        else drawCenteredString(mc.fontRenderer, displayString, xPosition + width / 2, yPosition + (height - 8) / 2, color)
       }
     }
   }
diff --git a/src/main/scala/li/cil/oc/client/gui/ServerRack.scala b/src/main/scala/li/cil/oc/client/gui/ServerRack.scala
index 060dab34e..627f3d77e 100644
--- a/src/main/scala/li/cil/oc/client/gui/ServerRack.scala
+++ b/src/main/scala/li/cil/oc/client/gui/ServerRack.scala
@@ -13,6 +13,8 @@ import net.minecraftforge.common.ForgeDirection
 import org.lwjgl.opengl.GL11
 
 class ServerRack(playerInventory: InventoryPlayer, val rack: tileentity.ServerRack) extends DynamicGuiContainer(new container.ServerRack(playerInventory, rack)) {
+  protected var switchButton: ImageButton = _
+
   protected var powerButtons = new Array[ImageButton](4)
 
   protected var sideButtons = new Array[GuiButton](4)
@@ -57,6 +59,9 @@ class ServerRack(playerInventory: InventoryPlayer, val rack: tileentity.ServerRa
         ClientPacketSender.sendServerRange(rack, range)
       }
     }
+    if (button.id == 10) {
+      ClientPacketSender.sendServerSwitchMode(rack, !rack.internalSwitch)
+    }
   }
 
   override def drawScreen(mouseX: Int, mouseY: Int, dt: Float) {
@@ -64,6 +69,7 @@ class ServerRack(playerInventory: InventoryPlayer, val rack: tileentity.ServerRa
       powerButtons(i).toggled = rack.isRunning(i)
       sideButtons(i).displayString = sideName(i)
     }
+    switchButton.displayString = if (rack.internalSwitch) Localization.ServerRack.SwitchInternal else Localization.ServerRack.SwitchExternal
     super.drawScreen(mouseX, mouseY, dt)
   }
 
@@ -78,9 +84,11 @@ class ServerRack(playerInventory: InventoryPlayer, val rack: tileentity.ServerRa
       add(buttonList, sideButtons(i))
     }
     for (i <- 0 to 1) {
-      rangeButtons(i) = new ImageButton(8 + i, guiLeft + 8 + i * 48, guiTop + 43, 16, 18, Textures.guiButtonRange, if (i == 0) "-" else "+")
+      rangeButtons(i) = new ImageButton(8 + i, guiLeft + 8 + i * 48, guiTop + 50, 16, 18, Textures.guiButtonRange, if (i == 0) "-" else "+")
       add(buttonList, rangeButtons(i))
     }
+    switchButton = new ImageButton(10, guiLeft + 8, guiTop + 17, 64, 18, Textures.guiButtonSwitch, Localization.ServerRack.SwitchExternal, textIndent = 18)
+    add(buttonList, switchButton)
   }
 
   override def drawGuiContainerForegroundLayer(mouseX: Int, mouseY: Int) = {
@@ -91,12 +99,13 @@ class ServerRack(playerInventory: InventoryPlayer, val rack: tileentity.ServerRa
       StatCollector.translateToLocal(rack.getInvName),
       8, 6, 0x404040)
 
-    fontRenderer.drawString(Localization.ServerRack.WirelessRange, 8, 31, 0x404040)
+    val rangeY = 39
+    fontRenderer.drawString(Localization.ServerRack.WirelessRange, 8, rangeY, 0x404040)
 
     {
       // Background for range value.
       val tx = 25
-      val ty = 43
+      val ty = 50
       val w = 30
       val h = 18
       val t = Tessellator.instance
@@ -114,7 +123,7 @@ class ServerRack(playerInventory: InventoryPlayer, val rack: tileentity.ServerRa
 
     drawCenteredString(fontRenderer,
       rack.range.toString,
-      40, 48, 0xFFFFFF)
+      40, 56, 0xFFFFFF)
 
     for (i <- 0 to 3 if powerButtons(i).func_82252_a) {
       val tooltip = new java.util.ArrayList[String]
diff --git a/src/main/scala/li/cil/oc/common/PacketType.scala b/src/main/scala/li/cil/oc/common/PacketType.scala
index 80f5c9ec5..7e4589d57 100644
--- a/src/main/scala/li/cil/oc/common/PacketType.scala
+++ b/src/main/scala/li/cil/oc/common/PacketType.scala
@@ -49,6 +49,9 @@ object PacketType extends Enumeration {
   MultiPartPlace,
   RobotAssemblerStart,
   RobotStateRequest,
+  ServerRange,
   ServerSide,
-  ServerRange = Value
+  ServerSwitchMode,
+
+  EndOfList = Value
 }
\ No newline at end of file
diff --git a/src/main/scala/li/cil/oc/common/container/ServerRack.scala b/src/main/scala/li/cil/oc/common/container/ServerRack.scala
index b3ed24129..3608533ef 100644
--- a/src/main/scala/li/cil/oc/common/container/ServerRack.scala
+++ b/src/main/scala/li/cil/oc/common/container/ServerRack.scala
@@ -1,6 +1,8 @@
 package li.cil.oc.common.container
 
+import cpw.mods.fml.relauncher.{Side, SideOnly}
 import li.cil.oc.common.tileentity
+import li.cil.oc.util.SideTracker
 import net.minecraft.entity.player.InventoryPlayer
 
 class ServerRack(playerInventory: InventoryPlayer, rack: tileentity.ServerRack) extends Player(playerInventory, rack) {
@@ -9,4 +11,23 @@ class ServerRack(playerInventory: InventoryPlayer, rack: tileentity.ServerRack)
   addSlotToContainer(106, 44)
   addSlotToContainer(106, 62)
   addPlayerInventorySlots(8, 84)
+
+  var lastSentSwitchMode = !rack.internalSwitch
+
+  @SideOnly(Side.CLIENT)
+  override def updateProgressBar(id: Int, value: Int) {
+    if (id == 0) {
+      rack.internalSwitch = value == 1
+    }
+  }
+
+  override def detectAndSendChanges() {
+    super.detectAndSendChanges()
+    if (SideTracker.isServer) {
+      if (lastSentSwitchMode != rack.internalSwitch) {
+        lastSentSwitchMode = rack.internalSwitch
+        sendProgressBarUpdate(0, if (lastSentSwitchMode) 1 else 0)
+      }
+    }
+  }
 }
diff --git a/src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala b/src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala
index 55249bc1c..97691a38c 100644
--- a/src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala
+++ b/src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala
@@ -7,7 +7,7 @@ import cpw.mods.fml.common.Optional.Method
 import cpw.mods.fml.relauncher.{Side, SideOnly}
 import li.cil.oc._
 import li.cil.oc.api.Network
-import li.cil.oc.api.network.{Analyzable, Connector, Node, Visibility}
+import li.cil.oc.api.network._
 import li.cil.oc.client.Sound
 import li.cil.oc.server.{component, driver, PacketSender => ServerPacketSender}
 import li.cil.oc.util.ExtendedNBT._
@@ -39,6 +39,8 @@ class ServerRack extends traits.PowerAcceptor with traits.Hub with traits.PowerB
 
   private var hasChanged = false
 
+  var internalSwitch = false
+
   // For client side rendering.
   var isPresent = Array.fill[Option[String]](getSizeInventory)(None)
 
@@ -143,6 +145,33 @@ class ServerRack extends traits.PowerAcceptor with traits.Hub with traits.PowerB
 
   // ----------------------------------------------------------------------- //
 
+  override protected def relayPacket(sourceSide: ForgeDirection, packet: Packet) {
+    if (internalSwitch) {
+      for (slot <- 0 until servers.length) {
+        val side = sides(slot)
+        if (side != sourceSide) {
+          servers(slot) match {
+            case Some(server) => server.node.sendToNeighbors("network.message", packet)
+            case _ =>
+          }
+        }
+      }
+    }
+    else super.relayPacket(sourceSide, packet)
+  }
+
+  override protected def onPlugMessage(plug: Plug, message: Message) {
+    // This check is a little hacky. Basically what we test here is whether
+    // the message was relayed internally, because only internally relayed
+    // network messages originate from the actual server nodes themselves.
+    // The otherwise come from the network card.
+    if (message.name != "network.message" || !(servers collect {
+      case Some(server) => server.node
+    }).contains(message.source)) super.onPlugMessage(plug, message)
+  }
+
+  // ----------------------------------------------------------------------- //
+
   override def getSizeInventory = 4
 
   override def getInventoryStackLimit = 1
@@ -260,6 +289,7 @@ class ServerRack extends traits.PowerAcceptor with traits.Hub with traits.PowerB
       }
     }
     range = nbt.getInteger(Settings.namespace + "range")
+    internalSwitch = nbt.getBoolean(Settings.namespace + "internalSwitch")
   }
 
   // Side check for Waila (and other mods that may call this client side).
@@ -285,6 +315,7 @@ class ServerRack extends traits.PowerAcceptor with traits.Hub with traits.PowerB
       terminalNbt
     }))
     nbt.setInteger(Settings.namespace + "range", range)
+    nbt.setBoolean(Settings.namespace + "internalSwitch", internalSwitch)
   }
 
   @SideOnly(Side.CLIENT)
diff --git a/src/main/scala/li/cil/oc/common/tileentity/traits/Hub.scala b/src/main/scala/li/cil/oc/common/tileentity/traits/Hub.scala
index d1d807a9e..85b279baa 100644
--- a/src/main/scala/li/cil/oc/common/tileentity/traits/Hub.scala
+++ b/src/main/scala/li/cil/oc/common/tileentity/traits/Hub.scala
@@ -78,7 +78,7 @@ trait Hub extends traits.Environment with SidedEnvironment {
   }
 
   protected def tryEnqueuePacket(sourceSide: ForgeDirection, packet: Packet) = queue.synchronized {
-    if (packet.ttl > 0 && queue.size < maxQueueSize && !plugs.exists(_.node.address == packet.source)) {
+    if (packet.ttl > 0 && queue.size < maxQueueSize) {
       queue += sourceSide -> packet.hop()
       if (relayCooldown < 0) {
         relayCooldown = relayDelay
@@ -156,7 +156,7 @@ trait Hub extends traits.Environment with SidedEnvironment {
   protected def onPlugDisconnect(plug: Plug, node: Node) {}
 
   protected def onPlugMessage(plug: Plug, message: Message) {
-    if (message.name == "network.message") message.data match {
+    if (message.name == "network.message" && !plugs.exists(_.node == message.source)) message.data match {
       case Array(packet: Packet) => tryEnqueuePacket(plug.side, packet)
       case _ =>
     }
diff --git a/src/main/scala/li/cil/oc/server/PacketHandler.scala b/src/main/scala/li/cil/oc/server/PacketHandler.scala
index 2ba677956..9029d3172 100644
--- a/src/main/scala/li/cil/oc/server/PacketHandler.scala
+++ b/src/main/scala/li/cil/oc/server/PacketHandler.scala
@@ -30,6 +30,7 @@ class PacketHandler extends CommonPacketHandler {
       case PacketType.RobotStateRequest => onRobotStateRequest(p)
       case PacketType.ServerRange => onServerRange(p)
       case PacketType.ServerSide => onServerSide(p)
+      case PacketType.ServerSwitchMode => onServerSwitchMode(p)
       case _ => // Invalid packet.
     }
 
@@ -177,4 +178,14 @@ class PacketHandler extends CommonPacketHandler {
       }
       case _ => // Invalid packet.
     }
+
+  def onServerSwitchMode(p: PacketParser) =
+    p.readTileEntity[ServerRack]() match {
+      case Some(rack) => p.player match {
+        case player: EntityPlayerMP if rack.isUseableByPlayer(player) =>
+          rack.internalSwitch = p.readBoolean()
+        case _ =>
+      }
+      case _ => // Invalid packet.
+    }
 }
\ No newline at end of file