Zone for Internal and External DNS
Posted on 2007-11-24
I have a DNS question which I just kind of need a 'Yes, that is right' or 'No that is OK' answer to. I am having some weird issues with my firewal using SMTP relay forwarding email to my SPAM firewall. It appears to be DNS related. Emails almost seem confused as to where to be sent to. This is a network I have come into that, from what I am told, has had a lot of issues. I have found that there is two external DNS servers and two active-directory integrated internal DNS servers. The two external DNS servers host the zone for our external servers and services. I then checked our internal to check its setup and configuration only to discover that the same zone hosted on our external DNS is also hosted on our internal DNS, along with the local zone. I have a pretty good grasp of DNS and In the past, I have always setup my internal DNS servers to point to my external DNS servers that hosted the zone for anything public. Am I wrong in thinking the zone on my internal DNS that is also hosted on my external should not be there?