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New Member

IPsec Behind Nat

I'm trying to setup an IPsec client behind common NAT firewalls(linksys, netgear, etc) and I can get most of the tunnel to build(ISAKMP passes, but IPsec fails)

When I'm behind a NAT firewall my L2TP doesn't authencate at all. When I'm in a public network I can authencate but I can't ping or connect to any internal servers.

Anybody know an PIX example that deals with dynamic ipsec clients behind a NAT device connecting to a PIX?

2 REPLIES
Silver

Re: IPsec Behind Nat

Do MS's l2tp clients work behind NAT? If you use Cisco's client against a pix or a 3000 concentrator, I know you shouldn't have any problems

New Member

Re: IPsec Behind Nat

Not sure if L2TP works behind NAT, but I tried to use the Cisco VPN Client 4, it wouldn't find a matchin crypto set

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