I've ran into a challlenge that goes a bit beyond my cisco knowledge. The situation is as following... I've got a Cisco 1841 with a 4-port switch module in it that does our internet access. I've set up a simple NAT, some port forwards, etc.. all works perfect. Now the situation arises where we want to connect the 2nd WAN port to a lease line as a form of site-to-site VPN for specific ports. The remote location works fine, the lease line works fine.. just the part in the Cisco 1841's configuration i can't seem to figure out.
If you look at the little "illustration" (ahem...) below:
- SERVER A (192.168.2.5) is a mailserver that can be accessed via internet and the local LAN (192.168.2.x/24).
- SERVER B (172.16.2.2) is also a mailserver that can be accessed via internet and it's local LAN ( 172.16.2.x/24 ). I would like SERVER A and SERVER B to be able to talk to eachother on port 25 via the leaseline.
- The Cisco Pix has port 25 forwarded to SERVER B, and works fine; so no change needed there.
- The Cisco 1841 has port 25 forwarded to SERVER A via FE0/0, this works fine.
I somehow need to make a 2nd NAT and portforward on FE0/1, but how would i configure that on the CISCO 1841 ?
[SERVER A]---[CISCO 1841]---FE0/0---(ISP)
\---FE0/1---(Leaseline)---[CISCO PIX]---[SERVER B]