If I do an nslookup on youtube.com, no problem, if I do one with www.youtube.com, failure. See details below.
[~] nslookup youtube.com
[~] nslookup www.youtube.com
;; Truncated, retrying in TCP mode.
;; Connection to 192.168.1.1#53(192.168.1.1) for www.youtube.com failed: connection refused.
If I do the same from a Windows machine its fine, its when I do it from a Mac workstation that I get the issue.
I have rebooted, both server and workstation, I did a changeip, but nothing is working.