[Efw-user] Weird DNS issue

[Jake V. <ja...@v2...>]

Hello everyone. I'm having a strange (at least I think so) DNS issue.  
(The website seems to be having issues right now as well..... as a FYI)
Anyway, I have programmed in DNS servers for my static IP connection on 
red. Green is running dhcp, and issues the firewall's IP address as a 
DNS server (192.168.6.1).
I gave the firewall the same domain name (milleniagallery.com) as the 
mail (mail.milleniagallery.com) and FTP servers 
(ftp.milleniagallery.com), which are hosted elsewhere. Everything works 
fine up to this point. Web pages resolve, people can surf, etc. BUT, 
they cannot access the email server/FTP server 
(mail.milleniagallery.com) while connected on green. It says unknown 
host. I tried to ping from the firewall CLI, and it says the same thing. 
It's like the firewall is not resolving that particular domain name. It 
resolves everything else. I know the DNS servers are good.
When I add the names (ftp.milleniagallery.com) to the /etc/hosts file, 
they can now access the FTP server and everything resolves again. This 
entry got cleaned out sometime during the night, though (does it rebuild 
these files periodically?), so they could not access the ftp/email 
again. Anyone have any ideas?
Thanks in advance.