Reverse DNS issues but related to Cisco ASA Firewall
Posted on 2014-07-29
So I have recently upgraded my Exchange server from 2003 to 2010 and mail seems to be flowing perfectly however the reverse DNS doesn't work
In my firewall (cisco asa) I have the following NAT configuration for Inside network:
Static - Source (192.168.1.8) - Interface (Outside - 18.104.22.168) - Address (Webmail = 22.214.171.124)
With this NAT rule I can run ActiveSync, Webmail, etc.. all from outside of the network however my Reverse DNS doesn't work but if I change it too:
Static - Source (192.168.1.8) - Interface (Outside - 126.96.36.199) - Address (reverse dns = 188.8.131.52)
Everything works like a charm for Reverse DNS but now my Webmail and ActiveSync no longer work from outside.
If I try to create 2 of those NATS one for webmail and one for reverse it tells me that "an overlapping error occurred and cannot be completed"
Before on my old server I had OWA and Exchange on two separate boxes, but now that there all on one box I cannot figure this out.
Thank you for all your help