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.IX Title "Mail::SpamAssassin::Plugin::URILocalBL 3"
.TH Mail::SpamAssassin::Plugin::URILocalBL 3 "2015-04-29" "perl v5.16.3" "User Contributed Perl Documentation"
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.SH "NAME"
URILocalBL \- blacklist URIs using local information (ISP names, address lists, and country codes)
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
This plugin creates some new rule test types, such as \*(L"uri_block_cc\*(R",
\&\*(L"uri_block_cidr\*(R", and \*(L"uri_block_isp\*(R".  These rules apply to the URIs
found in the \s-1HTML\s0 portion of a message, i.e. <a href=...> markup.
.PP
.Vb 1
\&  loadplugin    Mail::SpamAssassin::Plugin::URILocalBL
.Ve
.PP
Why local blacklisting? There are a few excellent, effective, and
well-maintained \s-1DNSBL\s0's out there. But they have several drawbacks:
.IP "\(bu" 2
blacklists can cover tens of thousands of entries, and you can't select which ones you use;
.IP "\(bu" 2
verifying that it's correctly configured can be non-trivial;
.IP "\(bu" 2
new blacklisting entries may take a while to be detected and entered, so it's not instantaneous.
.PP
Sometimes all you want is a quick, easy, and very surgical blacklisting of
a particular site or a particular \s-1ISP.\s0 This plugin is defined for that
exact usage case.
.SH "RULE DEFINITIONS AND PRIVILEGED SETTINGS"
.IX Header "RULE DEFINITIONS AND PRIVILEGED SETTINGS"
The format for defining a rule is as follows:
.PP
.Vb 1
\&  uri_block_cc SYMBOLIC_TEST_NAME cc1 cc2 cc3 cc4
.Ve
.PP
or:
.PP
.Vb 1
\&  uri_block_cidr SYMBOLIC_TEST_NAME a.a.a.a b.b.b.b/cc d.d.d.d\-e.e.e.e
.Ve
.PP
or:
.PP
.Vb 1
\&  uri_block_isp SYMBOLIC_TEST_NAME "DataRancid" "McCarrier" "Phishers\-r\-Us"
.Ve
.PP
Example rule for matching a \s-1URI\s0 in China:
.PP
.Vb 1
\&  uri_block_cc TEST1 cn
.Ve
.PP
This would block the \s-1URL\s0 http://www.baidu.com/index.htm.  Similarly, to
match a Spam-haven netblock:
.PP
.Vb 1
\&  uri_block_cidr TEST2 65.181.64.0/18
.Ve
.PP
would match a netblock where several phishing sites were recently hosted.
.PP
And to block all \s-1CIDR\s0 blocks registered to an \s-1ISP,\s0 one might use:
.PP
.Vb 1
\&  uri_block_isp TEST3 "ColoCrossing"
.Ve
.PP
if one didn't trust \s-1URL\s0's pointing to that organization's clients.  Lastly,
if there's a country that you want to block but there's an explicit host
you wish to exempt from that blacklist, you can use:
.PP
.Vb 1
\&  uri_block_exclude TEST1 www.baidu.com
.Ve
.PP
if you wish to exempt \s-1URL\s0's referring to this host. The same syntax is
applicable to \s-1CIDR\s0 and \s-1ISP\s0 blocks as well.
.SH "DEPENDENCIES"
.IX Header "DEPENDENCIES"
The Country-Code based filtering requires the Geo::IP module, which uses
either the fremium GeoLiteCountry database, or the commercial version of it
called GeoIP from MaxMind.com.
.PP
The \s-1ISP\s0 based filtering requires the same module, plus the GeoIPISP database.
There is no fremium version of this database, so commercial licensing is
required.