I'm trying to get a VPN to work with Checkpoint's SecureRemote client.
My ISP uses NAT - presenting a fixed routable address to the Internet
and passing the traffic back to me on a fixed private address over
DSL. I also have a second dynamic address also on NAT. At the Linux
box I use IPMasq to pass traffic back to a couple of Windows PCs and
IPChains to hold back the masses.
When I hook up a laptop to the DSL bridge I can connect over the VPN
using the fixed address or dhcp. When I try to go through the Linux
box it doesn't work. I opened the firewall to the appropriate UDP
traffic from work - I even opened the firewall to all traffic from
work. Still no dice. I am not aware of any need for portforwarding
any return connections from teh VPN server or anything like that - but
I may have missed something there. Does anyone have any suggestions?