I need to host a web site for one of the companies we own, so I setup their external DNS server to use my Public IP, then I setup IIS and my firewall. the web site works remotlly only.
But I also need to manage the site, so I added theirDomain.com as a zone to my DNS server and setup a A record with the site internal IP. After doing that, the site is working fromt he outside and the inside network which is a good thing.
However, I cannot get to any of the sites they hosting on their own, I cannot email them.
What I am doing wrong?