I have a client who has had a 2nd ADSL installed with their SINGLE NIC Windows 2003 server behind.
They now have 2 Netgear DG834 routers configured as
Public IP 80.14.x.x
LAN IP 192.168.180.1
Public IP 85.20.x.x
LAN IP 192.168.180.5
LAN IP 192.168.180.2
Gateway IP 192.168.180.1
This works fine to send incoming SMTP, Web and RAS traffic IN through Router1.
The problem occurs when I send traffic in through Router2. I get no response back from the server? I can see that the traffic is hitting the router from its logs and being forwarded to the Server.
Is this because the Server NIC has a gateway of 192.168.180.1 and is sending the response traffic out to Router 1?
I have tried setting a static route on Router 1 to Router 2 as follows:
Destination IP 85.20.x.x (Router2 Public IP) Gateway 192.168.180.5
but that doesn't work.
I have tried setting a second gateway on the server NIC of 192.168.180.5 and that seems to break everything!
Can someone please advise.