DNS server isn't responding,' 'DNS lookup failed,' 'NXDOMAIN' and 'DNS resolution timeout' are just some of the possible ways your browser or internet-enabled device tells you there is a DNS failure.

We have a problem with our DMZ mail server. What happens is that all of a sudden and seemingly quite randomly but usually once/twice a day it is just unable to resolve any addresses. It can still ping ...

I'm hitting my head off a wall with what appears to be a strange DNS problem. Background is that our VPN client will not connect when the user is off-site. After some poking around the logs i can see ...