Bogons via Routing Registries

Be sure to check out the main Bogon Reference for more information on the project and terminology used, and why it is important to keep your bogon filters up-to-date.

Bogon tracking via routing registries is possible due to donations from several of those registries. These objects all track the traditional IPv4 bogons, not the newer and more dynamic IPv4 and IPv6 fullbogons; to track those you will have to use one of the other available data sources. You can find bogon objects in the following registries:

RADb

The fine folks at Merit have donated a maintainer object within the RADb to the cause. MAINT-BOGON-FILTERS contains three filter-sets:

• fltr-unallocated
  The unallocated (by IANA) IPv4 prefixes.
• fltr-martian
  The reserved and special use IPv4 prefixes.
• fltr-bogons
  The combination of fltr-unallocated + fltr-martian.

Details about the RADb and the objects can be found through WHOIS, e.g.:

whois -h whois.radb.net <filter-set-name>

Here is an example WHOIS query for the fltr-martian object:

bogon$ whois -h whois.radb.net fltr-martian
filter-set: fltr-martian
descr:      Special use and reserved IPv4 prefixes.
filter:     {
            0.0.0.0/8^+ ,
            10.0.0.0/8^+ ,
            127.0.0.0/8^+ ,
            169.254.0.0/16^+ ,
            172.16.0.0/12^+ ,
            192.0.2.0/24^+ ,
            192.168.0.0/16^+ ,
            198.18.0.0/15^+ ,
            198.51.100.0/24^+ ,
            203.0.113.0/24^+ ,
            224.0.0.0/3^+
            }
admin-c:    Rob Thomas RT624
tech-c:     Rob Thomas RT624
remarks:    For the complete set of bogons, please see:
            fltr-unallocated - unallocated prefixes.
            fltr-bogons - fltr-unallocated + fltr-martian.
            http://www.cymru.com/Documents/bogon-list.html
notify:     radb@cymru.com
mnt-by:     MAINT-BOGON-FILTERS
changed:    noc@cymru.com 20100401  #17:52:52Z
source:     RADB

The objects can be queried via the RADb web interface as well.

Thanks to Boyan Krosnov for reviewing the filters and catching some errors!

Thanks to Shawn Kohlsmith for catching a typo in the description!

RIPE NCC

The fine folks at the RIPE NCC have also donated a maintainer object to the cause. MAINT-BOGON-FILTERS contains three filter-sets:

• fltr-unallocated
  The unallocated (by IANA) IPv4 prefixes.
• fltr-martian
  The reserved and special use IPv4 prefixes.
• fltr-bogons
  The combination of fltr-unallocated + fltr-martian.

Details from the RIPE NCC whois database can be obtained through the use of the whois tool:

whois -h whois.ripe.net <filter-set-name>

See the RADb entry above for examples.

Our thanks to Leo Vegoda, Vesna Manojlovic, and the RIPE NCC team for the donation! :)