Yep, it's just a Cisco VPN client straight into the router.

There are a load of warning messages in the event log. I'm not sure if they're causing the disconnections, or as a result of them though...for example:

A0F6EF1429324EA88798609AB20277E1) Conveyor 0 IOException: java.io.IOException: An existing connection was forcibly closed by the remote host com.vmware.vdi.ice.server.c.a(SourceFile:174)

java.io.IOException: An existing connection was forcibly closed by the remote host

at sun.nio.ch.SocketDispatcher.read0(Native Method)

at sun.nio.ch.SocketDispatcher.read(Unknown Source)

at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source)

at sun.nio.ch.IOUtil.read(Unknown Source)

at sun.nio.ch.SocketChannelImpl.read(Unknown Source)

at com.vmware.vdi.ice.server.c.a(SourceFile:146)

at com.vmware.vdi.ice.server.au.run(SourceFile:152)

(A0F6EF1429324EA88798609AB20277E1) Conveyor 0 IOException: java.io.IOException: An existing connection was forcibly closed by the remote host com.vmware.vdi.ice.server.c.a(SourceFile:174)

java.io.IOException: An existing connection was forcibly closed by the remote host

at sun.nio.ch.SocketDispatcher.read0(Native Method)

at sun.nio.ch.SocketDispatcher.read(Unknown Source)

at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source)

at sun.nio.ch.IOUtil.read(Unknown Source)

at sun.nio.ch.SocketChannelImpl.read(Unknown Source)

at com.vmware.vdi.ice.server.c.a(SourceFile:146)

at com.vmware.vdi.ice.server.au.run(SourceFile:152)

at java.lang.Thread.run(Unknown Source)