1Mail::SpamAssassin::PluUgsienr::CUoRnItLroicbaultBeLdM(a3Pi)elr:l:SDpoacmuAmsesnatsastiino:n:Plugin::URILocalBL(3)
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6 URILocalBL - blacklist URIs using local information (ISP names, address
7 lists, and country codes)
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10 This plugin creates some new rule test types, such as "uri_block_cc",
11 "uri_block_cidr", and "uri_block_isp". These rules apply to the URIs
12 found in the HTML portion of a message, i.e. <a href=...> markup.
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14 loadplugin Mail::SpamAssassin::Plugin::URILocalBL
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16 Why local blacklisting? There are a few excellent, effective, and well-
17 maintained DNSBL's out there. But they have several drawbacks:
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19 • blacklists can cover tens of thousands of entries, and you can't
20 select which ones you use;
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22 • verifying that it's correctly configured can be non-trivial;
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24 • new blacklisting entries may take a while to be detected and entered,
25 so it's not instantaneous.
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27 Sometimes all you want is a quick, easy, and very surgical blacklisting
28 of a particular site or a particular ISP. This plugin is defined for
29 that exact usage case.
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32 The format for defining a rule is as follows:
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34 uri_block_cc SYMBOLIC_TEST_NAME cc1 cc2 cc3 cc4
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36 or:
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38 uri_block_cont SYMBOLIC_TEST_NAME co1 co2 co3 co4
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40 or:
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42 uri_block_cidr SYMBOLIC_TEST_NAME a.a.a.a b.b.b.b/cc d.d.d.d-e.e.e.e
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44 or:
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46 uri_block_isp SYMBOLIC_TEST_NAME "DataRancid" "McCarrier" "Phishers-r-Us"
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48 Example rule for matching a URI in China:
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50 uri_block_cc TEST1 cn
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52 This would block the URL http://www.baidu.com/index.htm. Similarly, to
53 match a Spam-haven netblock:
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55 uri_block_cidr TEST2 65.181.64.0/18
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57 would match a netblock where several phishing sites were recently
58 hosted.
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60 And to block all CIDR blocks registered to an ISP, one might use:
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62 uri_block_isp TEST3 "ColoCrossing"
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64 if one didn't trust URL's pointing to that organization's clients.
65 Lastly, if there's a country that you want to block but there's an
66 explicit host you wish to exempt from that blacklist, you can use:
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68 uri_block_exclude TEST1 www.baidu.com
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70 if you wish to exempt URL's referring to this host. The same syntax is
71 applicable to CIDR and ISP blocks as well.
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74 The Country-Code based filtering requires the Geo::IP or GeoIP2 module,
75 which uses either the fremium GeoLiteCountry database, or the
76 commercial version of it called GeoIP from MaxMind.com.
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78 The ISP based filtering requires the same module, plus the GeoIPISP
79 database. There is no fremium version of this database, so commercial
80 licensing is required.
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82 uri_country_db_path STRING
83 This option tells SpamAssassin where to find the MaxMind country
84 GeoIP2 database. Country or City database are both supported.
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86 uri_country_db_isp_path STRING
87 This option tells SpamAssassin where to find the MaxMind isp GeoIP2
88 database.
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92perl v5.36.0 2022M-a0i7l-:2:3SpamAssassin::Plugin::URILocalBL(3)