IPsec VPN client duplicate subnet

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Apr 13th, 2009
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I have an issue where a client is using the Cisco VPN client from behind a firewall. The client is on a subnet, and the devices that they are trying to access are on a subnet. Because the Clinet software only adds a route to the assigned address, there is no connectivity.

Is there any way around this, without using split_tunneling?

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Ivan Martinon Mon, 04/13/2009 - 07:43
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If you are not using split tunnel you would still loose connectivity to your local subnet since the vpn client is instructed to tunnel everything. The possible split tunnel policy that might help you is excluding the local network on the remote site, however on your case it will be hard since the /8 range covers the remote network.

mark.j.hodge Tue, 04/14/2009 - 03:50
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Even though the client is instructed to tunnel everything, it apears thet the routing table overrides this, i.e because there is a local route to the subnet, traffic which should go through the tunnel to the subnet does not. Is this norma,l behaviour, or a bug with the client/ASA (both on latest level code).


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