I'm having trouble with my server accessing its own shared folder. The share is located at \\1740gis, and there's a corresponding DNS entry for the server as \\gis. Users can access the share from their workstations using either the machine name or the DNS name. However, when I try to access the share from the server itself using the DNS name \\gis, it prompts for credentials that I can't provide. Domain admins, local admins, and machine accounts all fail with \\gis. Only the UNC path for \\1740gis works locally. This is a new issue since it was working fine before; any advice on how to resolve this?
4 Answers
It sounds like you might need to set Alternate Service Principal Names (SPNs). This is often necessary for DNS aliases to ensure that services can connect without authentication issues. You can set the SPN using the command: `setspn -S HOST/gis 1740gis` and also consider adding the FQDN with `setspn -S HOST/gis.example.com 1740gis`. Make sure to sync Active Directory afterward! You can check out more info on Microsoft's documentation about SPNs.
Quick question, does the SPN need to be directly related to the shared path, or can it just handle external access? Like could you share how it works?
For tough authentication prompts, enabling Kerberos logging can help quite a bit. It lets you see any issues related to missing SPNs or delegation failures in the event viewer. Running `klist purge` before you log might also help clear up any old errors and get a cleaner view of the problem.
I faced a similar issue when DNS names got reused and the server cached the old IP. It's valuable to check your local firewall rules as well since they can block access unexpectedly. Use commands like `Get-NetFirewallRule` to inspect the rules related to file sharing and network discovery.
I had a similar issue last year after renaming a DNS alias. Random credential prompts were the result of cached DNS and missing SPNs. Running `ipconfig /flushdns` on the server and registering the SPN as mentioned seems to be spot on. Also double-check your firewall settings; sometimes they can interfere without obvious signs!
Yeah, definitely the right direction! SPNs are key for making sure everything plays nicely, especially if there are any monitoring services involved.