Re: NeXT Default Network

[Fred Baker]

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Could someone please tell me what 192.42.172.0/24 is or why it  
should be handled as a special prefix?


ftp://ftp-eng.cisco.com/cons/isp/security/Ingress-Prefix-Filter- 
Templates/T-ip-prefix-filter-ingress-strict-check-v18.txt


You might review the notes I list below, and specifically RFC 3330.  
They mention the prefix neither by name or by value...


I would expect that this had something to do with a company called  
NeXT and an operating system called NextStep. It sounds like they  
came up with a variety of site-local address pre-RFC1918 and pre- 
RFC3927 that did something similar to RFC 3927 addresses. This is  
mentioned in passing in RFCs 1117 and 1166. The big question is - are  
there any NextStep systems still in use (I last used one in 1990),  
and whether they have been configured with other addresses (seems  
likely, especially in a DHCP world).


http://www.ietf.org/rfc/rfc3330.txt
3330 Special-Use IPv4 Addresses. IANA. September 2002. (Format:
 TXT=16200 bytes) (Status: INFORMATIONAL)

http://www.ietf.org/rfc/rfc3789.txt
3789 Introduction to the Survey of IPv4 Addresses in Currently
 Deployed IETF Standards Track and Experimental Documents. P.  
Nesser,
 II, A. Bergstrom, Ed.. June 2004. (Format: TXT=22842 bytes)  
(Status:

 INFORMATIONAL)

http://www.ietf.org/rfc/rfc3790.txt
3790 Survey of IPv4 Addresses in Currently Deployed IETF Internet Area
 Standards Track and Experimental Documents. C. Mickles, Ed., P.
 Nesser, II. June 2004. (Format: TXT=102694 bytes) (Status:
 INFORMATIONAL)

http://www.ietf.org/rfc/rfc3791.txt
3791 Survey of IPv4 Addresses in Currently Deployed IETF Routing Area
 Standards Track and Experimental Documents. C. Olvera, P.  
Nesser, II.

 June 2004. (Format: TXT=27567 bytes) (Status: INFORMATIONAL)

http://www.ietf.org/rfc/rfc3792.txt
3792 Survey of IPv4 Addresses in Currently Deployed IETF Security Area
 Standards Track and Experimental Documents. P. Nesser, II, A.
 Bergstrom, Ed.. June 2004. (Format: TXT=46398 bytes) (Status:
 INFORMATIONAL)

http://www.ietf.org/rfc/rfc3793.txt
3793 Survey of IPv4 Addresses in Currently Deployed IETF Sub-IP Area
 Standards Track and Experimental Documents. P. Nesser, II, A.
 Bergstrom, Ed.. June 2004. (Format: TXT=11624 bytes) (Status:
 INFORMATIONAL)

http://www.ietf.org/rfc/rfc3794.txt
3794 Survey of IPv4 Addresses in Currently Deployed IETF Transport
 Area Standards Track and Experimental Documents. P. Nesser, II, A.
 Bergstrom, Ed.. June 2004. (Format: TXT=60001 bytes) (Status:
 INFORMATIONAL)

http://www.ietf.org/rfc/rfc3795.txt
3795 Survey of IPv4 Addresses in Currently Deployed IETF Application
 Area Standards Track and Experimental Documents. R. Sofia, P.  
Nesser,

 II. June 2004. (Format: TXT=92584 bytes) (Status: INFORMATIONAL)

http://www.ietf.org/rfc/rfc3796.txt
3796 Survey of IPv4 Addresses in Currently Deployed IETF Operations 
 Management Area Standards Track and Experimental Documents. P.
 Nesser, II, A. Bergstrom, Ed.. June 2004. (Format: TXT=78400  
bytes)

 (Status: INFORMATIONAL)


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Re: NeXT Default Network

[JAKO Andras]

 Fred, Brandon, Spiro,

Thanks for all your answers.

 operating system called NextStep. It sounds like they came up with a variety
 of site-local address pre-RFC1918 and pre-RFC3927 that did something similar
 to RFC 3927 addresses.

That's it. 192.42.172.0/24 is often used in examples, but I also found in 
the Automatic Host Addition chapter of 
http://www.levenez.com/NeXTSTEP/netinfo_user_guide.pdf the following:

The second property, configuration_ipaddr, is required and specifies the 
address that must not be allocated by nibootpd. This address is in fact 
the address that NeXT uses to identify a new workstation temporarily 
during the boot process. It should always be set to 192.42.172.253 
explicitly.

It looks like this /24 is (was) a must for their Automatic Host Addition 
process. So now I see how this prefix got into Barry's list.

Andras