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

[Stephen Smoogen]

On Wed, 2004-03-10 at 13:34, Michal Jankowski wrote:
> "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)
> 

I think that list is a bit longer now due to some other issues (Xerox
choosing one for printer detectionn and then too many other printers
emulationg it.

I have found that blocking the bogons was useful and painful. It was
useful in that we didnt route out a bunch of misconfigured traffic to
the backbone. It was painful for a cross project with PL.

>From the latest RFC
3. Summary Table

   Address Block             Present Use                       Reference
   ---------------------------------------------------------------------
   0.0.0.0/8            "This" Network                 [RFC1700, page 4]
   10.0.0.0/8           Private-Use Networks                   [RFC1918]
   14.0.0.0/8           Public-Data Networks         [RFC1700, page 181]
   24.0.0.0/8           Cable Television Networks                    --
   39.0.0.0/8           Reserved but subject
                           to allocation                       [RFC1797]
   127.0.0.0/8          Loopback                       [RFC1700, page 5]
   128.0.0.0/16         Reserved but subject
                           to allocation                             --
   169.254.0.0/16       Link Local                                   --
   172.16.0.0/12        Private-Use Networks                   [RFC1918]
   191.255.0.0/16       Reserved but subject
                           to allocation                             --
   192.0.0.0/24         Reserved but subject
                           to allocation                             --
   192.0.2.0/24         Test-Net
   192.88.99.0/24       6to4 Relay Anycast                     [RFC3068]
   192.168.0.0/16       Private-Use Networks                   [RFC1918]
   198.18.0.0/15        Network Interconnect
                           Device Benchmark Testing            [RFC2544]
   223.255.255.0/24     Reserved but subject
                           to allocation                             --
   224.0.0.0/4          Multicast                              [RFC3171]
   240.0.0.0/4          Reserved for Future Use        [RFC1700, page 4]


>   MJ
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-- 
Stephen John Smoogen		smoogen at lanl.gov
Los Alamos National Lab  CCN-5 Sched 5/40  PH: 4-0645
Ta-03 SM-1498 MailStop B255 DP 10S  Los Alamos, NM 87545
-- So shines a good deed in a weary world. = Willy Wonka --