[pmmail-list] is there a way in pm mail?

Tim Roberts pmmail-list@blueprintsoftwareworks.com
Thu, 15 Jan 2004 09:41:22 -0800


Marty Rimpau wrote:

>Hi, no problems, just want to free up that address if possible so I can
>have a static address to stream with.
>

You misunderstand the use of that address.  127.0.0.1 is a special IP 
address that means "this computer".  Any network packets that refer to 
address 127.0.0.1 will never leave the computer where they are created: 
the local machine will always respond to them.  You cannot send 
127.0.0.1 packets across a network.  It is an "internal" address.

If you want to refer to your machine from other computers, you have to 
use the "outside" address.  Ipconfig (in NT/2K/XP) or winipcfg (in 
98/ME) can tell you the outside address of your network adapters.  If 
you have a dial-up line or broadband with PPPOE, then your IP address 
will change from time to time, and there is no way to fix that.

Also, the IP address is only one part of a network communication.  The 
other part is a port number.  Norton acts as a POP3 mail server on 
127.0.0.1 port 110.  That doesn't affect any of the other ports.  
Computers usually have many servers occupying different ports on the 
same IP address.  Also, the fact that it listens on 127.0.0.1 port 110 
means that it will only respond to requests FROM your computer.  If 
another computer on your network tries to connect to 127.0.0.1 port 110, 
they will connect to their OWN POP server, not yours.

-- 
- Tim Roberts, timr@probo.com
  Providenza & Boekelheide, Inc.

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