i have a windows xp. i went to "start", "run", "cmd", then i type in "ipconfig/all". So then it gave me a list. And what bothers me is "DNS Suffix Search List......:domain_not_set.invalid" under WINDOWS CONFIGURATION. Then under Ethernet adapter Wireless connection, "Connection-specific DNS suffix..: domain_not_set.invalid"

 this issue have been giving me a major headache. HOw can i resolve this problem?  :-/What exactly is the problem? That is reports something is invalid? Does it still work?  the INTERNET work fine but the "domain_not_set.invalid" is preventing the DNS server to work. i mean, because if it was valid, then the DNS server would show two IP but in this CASE, it only show one and it appear to be INCORRECT.

 thus, it's preventing me to forward my ports (i think) --so people CANT connect to me on mIRC and i cant send files   <-- i dunno if it's related to the DNS suffix or not but I still want to fix this problem. please help!!!Are you behind a router? They can prevent such things.yes, i am behind a router. if it deal with the router, so then, how can i fix it?it sounds like your Computer name is not Setup, or your Domain your Connected to is not Registering it properly.

Try Renameing your Computer , then check the Error again

Also you can Manualy Enter the Dns Suffix , under Advanced in TCP/IP prperties, under the DNS tab
This should be Automatic, But you can set it your Routers DNS Suffix,
EG if your IP was 69.230.118.71
Resolved 69.230.118.71 to ppp-69-230-118-71.dsl.scrm01.pacbell.net
ppp-69-230-118-71.dsl.scrm01.pacbell.net would be your DNS Suffixthanks. i got it fix.