This is what its clearly stated on i.unlock you mentioned:

Nothing happens after i visit jailbreakme.com:
If you visit jailbreakme.com, install AppSnapp, get thrown back to the activtion screen and you have waited more then 3-5 minutes but phone does not restart - try restarting your phone manually. If phone starts normally everything is fine. If you still only get to the activation screen it did not work. Usually this is because there is a problem on the server, or maybe your internet connection. Wait some time (a few minutes if you are impatient, or a few hour if you want to be sure) and try again.

And I therefore conclude that it does not state about the DNS your trying to say. and for what I know, DNS setting is automatically given by mostly all routers now. maybe you use old setting routers. I think you are just blupping because you have no more explanation to share with your wrong post. i believe to master amnesia and dandy10. so what else alibi can you say man?