Server DNS resolution
Posted on 2006-05-31
I had a stand-alone server (2003) that had only one primary DNS server. That server died (all before I got here!!!) and the stand-alone server still had that server that died as its primary DNS server. There was no secondary DNS.
My question comes in because I am curious how it still was able to do name resolution. If you were to try and log on to that server via RDP, it would take about 5 minutes. If you tried to ping something else, it would take about 10 seconds. Now obviously this was because it was querying something to figure out how to resolve the names, which it did eventually do. Even though there was no DNS server for this to use, it still would resolve names, keeping in mind it was very slow.
It is not configured to use WINS. Nor do I even have a WINS server here.
So, in short, how did the server do name resolution without DNS or WINS? (It also was able to resolve a brand new server I just put online, so it couldnt have been using any cached information.) I would have never known there was a problem with the DNS except for the fact that it resolved names very very slowly.
There is no information in the hosts file.