I have a site, call it xyz.com that has it's public DNS, website, etc hosted withan ISP. Works fine. I have a small amount of control over the settings in the DNS server for xyz.com
We have 2 locations, one that was set up as a.xyz.com for the domain (192.168.1.x) and b.xyz.com (192.168.8.x) , but there is no DNS information about just xyz.com. They are self contained units, with b being added much later.
When I try to establish a trust between a.xyz.com and b.xyz.com, neither thinks the other is authoritative for the other's domain. Seems like I need some glue records somewhere to get this to work, but a conditional forwarder won't validate, tells me that the other server is not authoritative for that domain.
Tried to add a secondary DNS server on b for a, and a for b, and the step where it confirms the domain name fails as well.
DNS internally is working fine for the few clients that are on it, but the clients are dedicated machines essentially service one function, and don't really have any need to talk to anything else, except on a very occasional basis.
What do I need to do? Seems like I may need some kind of glue records at my ISP's DNS, but then I'd be handing out private IP's for the queries, which is OK, or I need another internal DNS server for xyz.com that has the right records.
What's my next step?
Thanks for any help.