[BC] IP Weirdness

[Dana Puopolo]

NoiP HAS to phone home all the time! That's how it works...let me explain.

You have a dynamic IP address, but you want to host web pages or whatever else
that normally requires a static IP address. So, you sign up with a service
like NoiP or DynDNS and let them do your DNS lookup/redirection. They put a
small program on one of your LAN computers that constantly pings the
mothership with your current public IP address (which it can also look up, as
can you at www.whatsmyipaddress.com). It HAS to work this way to get through
any firewalls. As long as your public IP address stays the same, nothing
happens-BUT when your ISP does change your address (and being dynamic, it will
change!), The mothership is notified of the change and makes the necessary
changes to your DNS entry. That way when someone types in www.jason.com, NoiP
already KNOWS the new IP address and redirects the query there.

-D


------ Original Message ------
Received: Mon, 26 May 2008 11:24:14 AM EDT
From: "Jason R." <jyrussell at academicplanet.com>
To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
Subject: Re: [BC] IP Weirdness

Rrrrrrggghhh..   (<ggg>) I was trying not to think about that.  (lol).

   Just can't tell people not to download everything they see.

   Do you have any idea about how the NoIP program works?  From what I've 
seen from the router logs... The machine with that program is constantly 
phoning home to a site in california.

   While I had set things up to block all ports except a weird little 
obscure number... corporate decided port 80 is the way to go for everything. 
The program says it's using that, however, when you follow through, it's 
actually opening two or 3 ports.  Port 80 appears to be only on the local 
machine, the other ports are on the router, and the reverse lookup seems to 
try to tie them all together.
IIRC, the reverse lookup number comes back to the same IP that was showing 
up during a Net View... 192.168.0.61 (when in reality, I had input 
xx.xx.0.75) -

While I have succeeded in getting that bit right, tracerts and pings and 
such use the proper numbers, the wobbly network stuff is back.

Humbug.
Jason
> Sounds like a candidate for a very good, thorough, virus scan.
>
> -- 
> Cowboy
>
>