I have a Windows 2003 domain controler that also provide DHCP and DNS services. We were always able to ping (or access more usefull services) a server by using only it's name, like this :
Suddenly, on a (Windows Vista Home) computer the server can no longer be reached this way. However I can still ping the server by its IP adresse of by using the FQDN :
ping 192.168.0.56 ping MyServer.MyDomain.net
The user of this computer thinks this behavior started after an update of antivirus program AVG.
What could cause the DNS resolution to fail for the computer name and at the same time work for the full path?