RE: networking trouble

[Scott Stone <SStone@example.com>]

woot old school huh?

RFC 1918 obsoletes RFC 1597 :)  but your assessment of the private-use
address space is correct.

to quote:

The Internet Assigned Numbers Authority (IANA) has reserved the following
three blocks of the IP address space for private internets: 


     10.0.0.0        -   10.255.255.255  (10/8 prefix)
     172.16.0.0      -   172.31.255.255  (172.16/12 prefix)
     192.168.0.0     -   192.168.255.255 (192.168/16 prefix)

therefore the original poster's use of 192.168.0.0/16 is perfectly valid :)

-----------------------------------------------------
Scott M. Stone <sstone@example.com>
Senior Technical Consultant - UNIX and Networking
Taos, the Sysadmin Company - Santa Clara, CA


-----Original Message-----
From: jwb@example.com [mailto:jwb@example.com]
Sent: Thursday, May 24, 2001 11:36 PM
To: tlug@example.com
Subject: Re: networking trouble


From: B0Ti <9915104t@example.com>
>> Jonathan Q wrote:
>> 
>> > > IP address: 192.168.1.83 (assigned by the ISP)
>> 
>> > Try renumbering this to 192.168.1.10 and see if it helps.
>> 
>> > > IP address: 192.168.2.11
>> > Like above, renumber this to 192.168.1.11 255.255.255.0.
>> 
>> The reason I didn't do this was because I assume 192.168.1.* adresses are
>> handled by the ISP,
>> and there is a chance that for example 192.168.1.11 is assigned to
>> somebody else, so if I set laptop or vmware to be the same IP it might
>> interfere with that.

No chance, unless the ISP is breaking the rules. 192.168.*.*
is one of a range of IP addresses that cannot be routed. They are
intended purely for private networks hiding behind NAT, portmapping,
etc.

This is all in RFC1597. The other such ranges are 10.0.0.0 -
10.255.255.255 and 172.16.0.0 - 172.31.255.255.

You can read all about this in some old lecture notes of mine:

http://www.csse.monash.edu.au/~jwb/subjects/cse5803/addr/addr_issues.html

Jim
-- 
Jim Breen  [jwb@example.com  http://www.csse.monash.edu.au/~jwb/]
Visiting Professor, Institute for the Study of Languages and Cultures of 
Asia and Africa, Tokyo University of Foreign Studies, Japan
+81 3 5974 3880         [$B%8%`!&%V%j!<%s(B@$BEl5~30Bg(B]

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