How to solve Local and Remote IP conflict?

[muggidk]

I am trying to figure out how to solve a connection issue. I have to connect from our office to a customers office. Problem is that we are using the same ip address range on our subnets. They are both 192.168.5.0/24.

The customer needs to connect to a server on our network 192.168.5.3. The setup is:

CUSTOMER NET ->    CUSTOMER FW       -> Internet ->      OUR FW                 -> OUR SEVER
192.168.5.0/24      inside 192.168.5.1/24                       inside 192.168.5.1/24       192.168.5.3
                          outside 88.88.88.01                         outside 88.88.88.02

I have tried making a tunnel to a local subnet called 192.168.15.0/24 but the tunnel will not connect. Is it because of the bogus ip address, or is it someting else. I have tried adding the network 192.168.15.0/24 under Firewall -> Virtual IP, but that did not help. I think I would need a virtual ip for the lan interface like 192.168.15.1, right? How do I do that?

Would it be possible to then create a NAT rule translating a connection to an IP on the 192.168.15.0/24 network to the server addres o our network 192.168.5.3? And how do i do that?!?

[Cry Havok]

You've got an interesting challenge there ;)

The best solution is to change your network to something not in the 192.168.x.x range.  Maybe something in the 172.16-172.31 or 10. ranges.

[dotdash]

Another solution is to pitch in on the existing bounty. http://forum.pfsense.org/index.php/topic,10570.0.html