"How to configure an L2TP/IPsec server behind a NAT-T" MS KB did not work for us.
Running 2.2.4-RELEASE (i386). Not planning the upgrade yet.
We're unable to forward L2TP traffic to the server behind NAT.
We're seeing traffic coming on port 4500, VPN connection is estabilished, however there is no routed traffic. All NPS polices seems to be fine. No firewall rules blocking. No ACLs blocking.
We're not seeing anything behind this server.
Forwarded traffic:
TCP/UDP 1701 WAN -> server
TCP/UDP 500 WAN -> server
TCP/UDP 4500 WAN -> server
AH protocol WAN -> server
ESP protocol WAN -> server
Issue seems to be covering this thread.
Next step is to sniff some traffic and check what is going on.
Any ideas?