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Internet sorta question.. Resolving my IP..

T

TheVrolok

Lifer
It seems that my IP is no longer resolved .. ie .. on IRC servers/MUD servers.. anywhere.. I'd be ctt12345.ceinetworks.com but all of a sudden it no longer resolves.. I'm 123.123.123.123 now instead .. Typically this wouldn't pose a problem.. except I SSH into a few linux boxes that are set up to allow only certain hosts.. and thus I'm no longer able to connect. I was going to get a lot of work finish this weekend and now it seems that I won't be able to, anyone know if there's a way I can reverse this?
 
There's no way you personally can resolve it. If the remote server can't resolve the IP to a domain name, then that means its own DNS server no longer has the entry and also can't get it from the authoritative server. Check whether you can resolve it locally. The server maintaining your network's records may have been modified, or the cached information may have expired or something like that. Your IT people may need to check into it.

A server limited to certain hosts ought to be using the IP address anyway. DNS is too variable.
 
Sorry I confused myself. Obviously the SSH server is trying to look up the IP and is failing because it can't find a domain name for it. I meant that I don't see a reason it needs to have a host name located via reverse DNS if it already knows what IP's are to be allowed.

Whoever is the registered assignee of the IP block is responsible for reverse DNS on those IPs. This might be your company, or the Internet provider they use.
 
Originally posted by: Lord Evermore
Sorry I confused myself. Obviously the SSH server is trying to look up the IP and is failing because it can't find a domain name for it. I meant that I don't see a reason it needs to have a host name located via reverse DNS if it already knows what IP's are to be allowed.

Whoever is the registered assignee of the IP block is responsible for reverse DNS on those IPs. This might be your company, or the Internet provider they use.
Click to expand...

Nod, I kinda assumed this was so but wanted to clear it up.. I appreciate the response greatly. I think I do recall getting a letter from my ISP about some kind of intensive system upgrade that would take place over a few weeks.. I'd be getting a new modem, email addy, etc.. who knows.. perhaps this is the begining of that change.
 
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