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Allow a Cisco VPN Client through Firewall-1 NG

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vinnie182

IS-IT--Management
Aug 21, 2003
1
AU
We have FW-1 NG and we are trying to access a VPN server hosted by another company.

If we install the Cisco VPN client (Version 3.5.1e) on a PC outside the firewall, it connects with no problems.

When we put the PC inside the firewall we allow all traffic from that PC to the VPN, we can ping the VPN server and get a reply but the VPN client won't connect (which is what we expect because it needs to be NATed).

When we NAT the PC (to an external address that works when we put the PC outsite the firewall) ping no longer works and it seems to encrypt the traffic and the VPN server doesn't know how to respond.

How to I stop FW-1 from encrypting the VPN traffic?

Cheers

Vinnie
 
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