I can't find any servers

[Notorious]

I'm not quite aware with the technicalities behind this so could you explain what making my 'DNS public' means? Is there any negatives to it etc

Couldn't answer, Dave (owner) suggested this as a fix for many of other users who had a problem like yours. He wouldn't suggest something that could harm you in anyway.

Have you also made sure your firewall isn't blocking Gunz? Try a good old fashion reboot of your router aswell