[Mimedefang] "special use" IPv4 addresses to consider: RFC 3330

Michal Jankowski Michal.Jankowski at fuw.edu.pl
Wed Mar 10 15:34:10 EST 2004


"Jon R. Kibler" <Jon.Kibler at aset.com> writes:

> The authoritative list of bogus IP address can be found at:
> 	http://www.cymru.com/Documents/bogon-dd.html

Please _do not_ use any of the unused/reserved IP ranges for any
special purpose, specifically please _do not_ even think of blocking
them on firewalls etc.

It isn't really fun to get assigned a "new" address (say, 83.x.x.x) and
find yourself blocked from accessing large parts of the Internet (it
took many weeks to persuade eg. Yahoo to unblock 83.x.x.x).

And if you are afraid of spoofing - well, spoofers are free to (and
even more likely to) choose spoofed address form the currently _used_
ranges.

The only ranges permanently assigned for private use are:
     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)

  MJ



More information about the MIMEDefang mailing list