I'm working on a small domain consisting of several Win 2003 servers and workstations connected on a single Win 2003 domain controller.
Occasionally, and without apparent regularity, one of our users (the only non-admin user) experiences DNS resolution failures to one of our web tiers, making the web-app he's working on unreachable but only on that system and to him.
EDIT: Added cases relating to better performance with the A record.
There appears to be a distinction between CNAME and A record results. web1 is a CNAME record and we'll call the system's A record server1.
I've identified the following details on his user account, on his system:
nslookup web1.fqdn.comtimes out but does display the correct IP address
nslookup web1displays the correct address with no timeout
nslookup server1displays the correct address with no timeout
ping server1reaches the server as expected.
ping web1fails to look up IP, does not reach server
ping web1.fqdn.comfails to look up IP, does not reach server
- Event logs on any of the DC, workstation and webserver are clean.
- Restarting DNS on the DC didn't help.
- Rebooting the user's workstation didn't help.
Where can I look at this point to try to restore DNS functionality to this user?