DNS Problem

IITYWYBMAD

A strange problem that's actually wrecking my head. We are on an AD setup, and we have our own internal DNS server. IP's are fired out using DHCP, clients are XP pro.

Our company website is http://www.mycompany.com, but we also have a subdomain called http://sales.mycompany.com. We cannot access the subdomain internally unless we change our DNS server to be an external DNS server. So, for example:

Client setup
IP 192.168.3.1
GW 192.168.3.20
DNS 192.168.3.68 Does not work

Client Setup
IP 192.168.3.1
GW 192.168.3.20
DNS 194.125.133.11 Does work

I know it has something to do with an entry on the DNS server, but cannot figure out what. Any help, is most welcome.

ressem

What response does your DNS server reply with?

Start > run > cmd

nslookup

server 192.168.3.68

sales.mycompany.com

Does it return the correct ip address?

If your internal DNS uses the zone, mycompany.com instead of, for example, mycompany.local; then for each entry made to the external DNS (run by your domain registrar) for sales, www, mail etc your admin will need to manually make a corresponding entry on the internal DNS server also, as it will not pass on the request to the external server for this zone.

IITYWYBMAD

Thanks for your reply ressem. You identified the exact issue. Once I made a manual entry for the external entities, it solved the issue.

Thanks again.