Hi,
What I understand from your post the situation is the following
- You have a mail server on your inside network
- Its NATed to a public IP from your ISP
- The public IP has DNS name of owa.test.com associated with it
- You are connecting to the mail server from your inside network with the DNS name?
If this is the case can you please provide me with the following information
- the "static" command for the mail server (you can leave out the actual IPs if needed)
- Is the DNS server you local computer uses located in the Internet or your local network?
I think you will need the ASA to handle the DNS replies that are coming from a DNS server from the outside network
This would require that you have a "dns" parameter in your "static" nat command for the mail server.
For example likes this (presuming you are running software 8.2 or earlier):
static (inside,outside) 4.4.4.4 x.x.x.x netmask 255.255.255.255 dns
If you are running 8.3 or newe software the same would be
object network MAIL-SERVER
host x.x.x.x
nat (inside,outside) static 4.4.4.4 dns
Hope this helps.
Please rate if it was any of any help
- Jouni