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New Member

VPN - same inside ip subnets

Has anyone had this problem or know a work around?

I have a client who has an Altiga 3005 vpn concentrator. Their inside ip subnet at the home office is 172.16.1.x. If one of the employees goes to a customer who also has a 172.16.1.x inside subnet the connection does not work properly.

The vpn client connects and logs the user in, however the user cannot ping anything back at the home office (the vpn client does not seem to try to send this through the ipsec tunnel). However, the user cannot ping his local default gateway at his customer or any machines on that subnet.

Hence, the user cannot connect to his NT/2000 shares.

Split tunneling is turned off on the Altiga as is Local Lan access on the vpn client. When the user attempts to connect to the internet through his vpn connection, is DOES work, going through his home office's PIX.

If the user goes to a customer who uses say a 10.1.1.x network, all works well.

Any solutions?




New Member

Re: VPN - same inside ip subnets

IP parkets can only be routed to the specified default gateway when there is no specific route in the routing table. In the scenerio, you pointed out, traffics destined for 172.16.1.x, would naturally be routed to the inside subnet. Traffics to other subnets would go, cos they would be directed to the default gateway, which will point them to your home office, that explain why the internet browsing is working.

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