I acknowledge this is a unique situation and a long-shot solution, but it’s hopefully something that will work for me.
We have two sites connected by a PtP T1. At each end of this T1 are Cisco 1700 routers running IOS v12.2. We recently upgraded software at the remote site, and discovered that the client software doesn’t want to talk to the credit card processor running on a server at the home office. After much troubleshooting, we discovered that the issue seems to be related to the fact that the two machines are on different subnets. There is no problem with routing or firewalls, as we can telnet into the credit card processor on the appropriate port from the client machines.
What I’m hoping to do is to set the router up with port forwarding so that the data flow looks like this:
-Client machine sends data to 10.4.1.1:17467
-Router forwards data to 10.2.1.10:17467
(Where 10.4.1.1 is the remote router, 10.2.1.10 is the credit card processor, and 17467 is the port used by the credit card processor.)
The tricky part about all this is that I don’t want to put the remote site behind NAT, as this would cause a world of headaches.
I’ve already tried adding the following line to the router configuration to no avail:
ip nat inside source static tcp 10.2.1.10 17467 interface FastEthernet 0/0 17467
Thoughts and suggestions are appreciated. Thanks.