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Mail::SpamAssassin::Plugin::ASNUser)Contributed Perl DocumentMail::SpamAssassin::Plugin::ASN(3pm)
NAME
Mail::SpamAssassin::Plugin::ASN - SpamAssassin plugin to look up the Autonomous System
Number (ASN) of the connecting IP address.
SYNOPSIS
loadplugin Mail::SpamAssassin::Plugin::ASN
asn_lookup asn.routeviews.org _ASN_ _ASNCIDR_
add_header all ASN _ASN_ _ASNCIDR_
DESCRIPTION
This plugin uses DNS lookups to the services of "http://www.routeviews.org/" to do the
actual work. Please make sure that your use of the plugin does not overload their
infrastructure - this generally means that you should not use this plugin in a high-volume
environment or that you should use a local mirror of the zone (see
"ftp://ftp.routeviews.org/dnszones/").
TEMPLATE TAGS
This plugin allows you to create template tags containing the connecting IP's AS number
and route info for that AS number.
The default config will add a header that looks like this:
X-Spam-ASN: AS24940 213.239.192.0/18
where "AS24940" is the ASN and "213.239.192.0/18" is the route announced by that ASN where
the connecting IP address came from. If the AS announces multiple networks (more/less
specific), they will all be added to the "_ASNCIDR_" tag, separated by spaces, eg:
X-Spam-ASN: AS1680 89.138.0.0/15 89.139.0.0/16
CONFIGURATION
The standard ruleset contains a configuration that will add a header containing ASN data
to scanned messages. The bayes tokenizer will use the added header for bayes
calculations, and thus affect which BAYES_* rule will trigger for a particular message.
Note that in most cases you should not score on the ASN data directly. Bayes learning
will probably trigger on the _ASNCIDR_ tag, but probably not very well on the _ASN_ tag
alone.
SEE ALSO
http://www.routeviews.org/ - all data regarding routing, ASNs etc
http://issues.apache.org/SpamAssassin/show_bug.cgi?id=4770 - SpamAssassin Issue #4770
concerning this plugin
STATUS
Experimental - Dec. 18, 2006
No in-depth analysis of the usefulness of bayes tokenization of ASN data has been
performed.
ADMINISTRATOR SETTINGS
asn_lookup asn-zone.example.com [ _ASNTAG_ _ASNCIDRTAG_ ]
Use this to lookup the ASN info for first external IP address in the specified zone
and add the AS number to the first specified tag and routing info to the second
specified tag.
If no tags are specified the AS number will be added to the _ASN_ tag and the routing
info will be added to the _ASNCIDR_ tag. You must specify either none or both of the
tags. Tags must start and end with an underscore.
If two or more asn_lookups use the same set of template tags, the results of their
lookups will be appended to each other in the template tag values in no particular
order. Duplicate results will be omitted when combining results. In a similar
fashion, you can also use the same template tag for both the AS number tag and the
routing info tag.
Examples:
asn_lookup asn.routeviews.org
asn_lookup asn.routeviews.org _ASN_ _ASNCIDR_
asn_lookup myview.example.com _MYASN_ _MYASNCIDR_
asn_lookup asn.routeviews.org _COMBINEDASN_ _COMBINEDASNCIDR_
asn_lookup myview.example.com _COMBINEDASN_ _COMBINEDASNCIDR_
asn_lookup in1tag.example.net _ASNDATA_ _ASNDATA_
perl v5.10.0 2008-06-10 Mail::SpamAssassin::Plugin::ASN(3pm)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-24 18:12 @38.107.179.240 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)