Hello, i having problem with VPN connection from a windows PC using L2TP/IPsec, i alow all necesary protocols (GRE, ESP, PPTP, UDP-500, UDP-4500 and UDP-1701) on outside interface on PIX (version 8.0(4)), i'm perfectly connect with PPTP but when i tried with L2TP the conecction can't be established, in PIX log i can see the creating session for ports 500 and 4500, on PC have and error that the server can be reach. I'm using a ISA Server cluster for VPN Server, the configuration are like follows:
PC <----> PIX <-----> MS ISA <------> LAN
PC IP 10.3.0.12/28
PIX external IP 10.3.0.1/28
PIX Internal IP 172.16.0.1/28
ISA external IP 172.16.0.2/28
I'm using Static NAT for the external interface of the ISA for the VPN access with IP 10.3.0.3
What might be forgetting???
I will appretiated the help any one can provide me.