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Date:      Sun, 24 Sep 2000 14:22:08 -0500 (CDT)
From:      "Arnold B. Cavazos, Jr." <abcjr@southwind.net>
To:        freebsd-isp@FreeBSD.ORG
Subject:   RE: Using 'private net' IPs for WAN Addresses
Message-ID:  <Pine.BSI.4.21.0009241420130.5679-100000@jasper.southwind.net>
In-Reply-To: <3073B3378589D411B21600508BAF32AA01233F@EXCHANGE>

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Here is a great description on why one should not use RFC 1918 addresses
for inter-router links:

http://www.worldgate.com/~marcs/mtu/

----------------------------------------------------------
Arnold Cavazos, Jr.                    abcjr@southwind.net
General Manager
SouthWind Internet Access, Inc.      
A OneMain.com Company


On Wed, 20 Sep 2000, Nathan Williams wrote:

>Considering the shortage of IP addresses under IPv4, I can only think of
>good reasons for ISPs using private network addresses.  Also, not being
>accessible from the Internet can actually be a very good thing for ISPs, as
>many of these addresses are routers which need to be secure and have a
>minimal level of outside traffic. 
>Nathan Williams
>nathanw@nils.lib.il.us
>
>> -----Original Message-----
>> From:	Adrian Gonzalez [SMTP:adrianbsd@globalpc.net]
>> Sent:	Wednesday, September 20, 2000 1:37 PM
>> To:	freebsd-isp@freebsd.org
>> Subject:	Using 'private net' IPs for WAN Addresses
>> 
>> 
>> Hello everyone
>> 
>> Over the years I've seen several ISPs use 192.168.x.x or other of the IP
>> ranges reserved for private networks as WAN adressess for point-to-point
>> links on the Internet.
>> 
>> Personally, I've always felt this to be a bad idea, but I can't come up
>> with a compelling reason to convince people not to do it.  Is there a
>> reason not to?  or is it just a matter of keeping apples and oranges in
>> their respective baskets?
>> 
>> The only thing I can come up with is that you can ping the routers in
>> question from outside your own net if you use 'real' IPs.
>> 
>> -Adrian
>> 
>> 
>> 
>> 
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