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mod_asn looks up the AS and network prefix of IP address

mod_asn is an Apache module doing lookups of the autonomous system (AS)[1], and
the network prefix[2] which contains a given (clients) IP address.

It is written with scalability in mind. To do high-speed lookups, it uses the
PostgreSQL ip4r datatype[3] that is indexable with a Patricia Trie[4] algorithm to
store network prefixes. This is the only algorithm that can search through the
~250.000 existing prefixes in a breeze.

It comes with script to create such a database (and keep it up to date) with
snapshots from global routing data - from a router's "view of the
world", so to speak.

Apache-internally, the module sets the looked up data as env table variables,
for perusal by other Apache modules. In addition, it can send it as response
headers to the client.

It is published under the Apache License, Version 2.0.

Project web page: http://mirrorbrain.org/mod_asn/
Source code: http://svn.mirrorbrain.org/svn/mod_asn/trunk/

Author: Peter Poeml

[1] http://en.wikipedia.org/wiki/Autonomous_system_(Internet)
[2] http://en.wikipedia.org/wiki/Subnetwork
[3] http://pgfoundry.org/projects/ip4r/
[4] http://en.wikipedia.org/wiki/Radix_tree


Source Files

Filename Size Changed Actions
apache2-mod_asn-Debian_8.0.dsc 222 Bytes 6 months ago Download File
apache2-mod_asn.changes 9.39 KB 6 months ago Download File
apache2-mod_asn.dsc 266 Bytes almost 2 years ago Download File
apache2-mod_asn.spec 3.19 KB almost 2 years ago Download File
debian.changelog 823 Bytes almost 2 years ago Download File
mod_asn-1.6.tar.gz 23.2 KB 6 months ago Download File

Latest Revision

Christian Lohmaier Christian Lohmaier (cloph) committed 6 months ago (revision 31)

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