Unix/Linux Go Back    


CentOS 7.0 - man page for mail::spamassassin::plugin::uridnsbl (centos section 3)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


Mail::SpamAssassin::Plugin::URIUserLContributed Perl DocumMail::SpamAssassin::Plugin::URIDNSBL(3)

NAME
       URIDNSBL - look up URLs against DNS blocklists

SYNOPSIS
	 loadplugin    Mail::SpamAssassin::Plugin::URIDNSBL
	 uridnsbl      URIBL_SBLXBL    sbl-xbl.spamhaus.org.   TXT

DESCRIPTION
       This works by analysing message text and HTML for URLs, extracting the domain names from
       those, querying their NS records in DNS, resolving the hostnames used therein, and
       querying various DNS blocklists for those IP addresses.	This is quite effective.

USER SETTINGS
       skip_uribl_checks ( 0 | 1 )   (default: 0)
	   Turning on the skip_uribl_checks setting will disable the URIDNSBL plugin.

	   By default, SpamAssassin will run URI DNSBL checks. Individual URI blocklists may be
	   disabled selectively by setting a score of a corresponding rule to 0 or through the
	   uridnsbl_skip_domain parameter.

	   See also a related configuration parameter skip_rbl_checks, which controls the DNSEval
	   plugin (documented in the Conf man page).

       uridnsbl_skip_domain domain1 domain2 ...
	   Specify a domain, or a number of domains, which should be skipped for the URIBL
	   checks.  This is very useful to specify very common domains which are not going to be
	   listed in URIBLs.

       clear_uridnsbl_skip_domain [domain1 domain2 ...]
	   If no argument is given, then clears the entire list of domains declared by
	   uridnsbl_skip_domain configuration directives so far. Any subsequent
	   uridnsbl_skip_domain directives will start creating a new list of skip domains.

	   When given a list of domains as arguments, only the specified domains are removed from
	   the list of skipped domains.

RULE DEFINITIONS AND PRIVILEGED SETTINGS
       uridnsbl NAME_OF_RULE dnsbl_zone lookuptype
	   Specify a lookup.  "NAME_OF_RULE" is the name of the rule to be used, "dnsbl_zone" is
	   the zone to look up IPs in, and "lookuptype" is the type of lookup (TXT or A).   Note
	   that you must also define a body-eval rule calling "check_uridnsbl()" to use this.

	   Example:

	    uridnsbl	    URIBL_SBLXBL    sbl-xbl.spamhaus.org.   TXT
	    body	    URIBL_SBLXBL    eval:check_uridnsbl('URIBL_SBLXBL')
	    describe	    URIBL_SBLXBL    Contains a URL listed in the SBL/XBL blocklist

       uridnssub NAME_OF_RULE dnsbl_zone lookuptype subtest
	   Specify a DNSBL-style domain lookup with a sub-test.  "NAME_OF_RULE" is the name of
	   the rule to be used, "dnsbl_zone" is the zone to look up IPs in, and "lookuptype" is
	   the type of lookup (TXT or A).

	   "subtest" is a sub-test to run against the returned data.  The sub-test may be in one
	   of the following forms: m, n1-n2, or n/m, where n,n1,n2,m can be any of: decimal
	   digits, 0x followed by up to 8 hexadecimal digits, or an IPv4 address in quad-dot
	   form. The 'A' records (IPv4 dotted address) as returned by DNSBLs lookups are
	   converted into a numerical form (r) and checked against the specified sub-test as
	   follows: for a range n1-n2 the following must be true: (r >= n1 && r <= n2); for a n/m
	   form the following must be true: (r & m) == (n & m); for a single value in quad-dot
	   form the following must be true: r == n; for a single decimal or hex form the
	   following must be true: (r & n) != 0.

	   Some typical examples of a sub-test are: 127.0.1.2, 127.0.1.20-127.0.1.39,
	   127.0.1.0/255.255.255.0, 0.0.0.16/0.0.0.16, 0x10/0x10, 16, 0x10 .

	   Note that, as with "uridnsbl", you must also define a body-eval rule calling
	   "check_uridnsbl()" to use this.

	   Example:

	     uridnssub	 URIBL_DNSBL_4	  dnsbl.example.org.   A    127.0.0.4
	     uridnssub	 URIBL_DNSBL_8	  dnsbl.example.org.   A    8

       urirhsbl NAME_OF_RULE rhsbl_zone lookuptype
	   Specify a RHSBL-style domain lookup.  "NAME_OF_RULE" is the name of the rule to be
	   used, "rhsbl_zone" is the zone to look up domain names in, and "lookuptype" is the
	   type of lookup (TXT or A).	Note that you must also define a body-eval rule calling
	   "check_uridnsbl()" to use this.

	   An RHSBL zone is one where the domain name is looked up, as a string; e.g. a URI using
	   the domain "foo.com" will cause a lookup of "foo.com.uriblzone.net".  Note that
	   hostnames are stripped from the domain used in the URIBL lookup, so the domain
	   "foo.bar.com" will look up "bar.com.uriblzone.net", and "foo.bar.co.uk" will look up
	   "bar.co.uk.uriblzone.net".

	   If an URI consists of an IP address instead of a hostname, the IP address is looked up
	   (using the standard reversed quads method) in each "rhsbl_zone".

	   Example:

	     urirhsbl	     URIBL_RHSBL    rhsbl.example.org.	 TXT

       urirhssub NAME_OF_RULE rhsbl_zone lookuptype subtest
	   Specify a RHSBL-style domain lookup with a sub-test.  "NAME_OF_RULE" is the name of
	   the rule to be used, "rhsbl_zone" is the zone to look up domain names in, and
	   "lookuptype" is the type of lookup (TXT or A).

	   "subtest" is a sub-test to run against the returned data.  The sub-test may be in one
	   of the following forms: m, n1-n2, or n/m, where n,n1,n2,m can be any of: decimal
	   digits, 0x followed by up to 8 hexadecimal digits, or an IPv4 address in quad-dot
	   form. The 'A' records (IPv4 dotted address) as returned by DNSBLs lookups are
	   converted into a numerical form (r) and checked against the specified sub-test as
	   follows: for a range n1-n2 the following must be true: (r >= n1 && r <= n2); for a n/m
	   form the following must be true: (r & m) == (n & m); for a single value in quad-dot
	   form the following must be true: r == n; for a single decimal or hex form the
	   following must be true: (r & n) != 0.

	   Some typical examples of a sub-test are: 127.0.1.2, 127.0.1.20-127.0.1.39,
	   127.2.3.0/255.255.255.0, 0.0.0.16/0.0.0.16, 0x10/0x10, 16, 0x10 .

	   Note that, as with "urirhsbl", you must also define a body-eval rule calling
	   "check_uridnsbl()" to use this.

	   Example:

	     urirhssub	 URIBL_RHSBL_4	  rhsbl.example.org.   A    127.0.0.4
	     urirhssub	 URIBL_RHSBL_8	  rhsbl.example.org.   A    8

       urinsrhsbl NAME_OF_RULE rhsbl_zone lookuptype
	   Perform a RHSBL-style domain lookup against the contents of the NS records for each
	   URI.  In other words, a URI using the domain "foo.com" will cause an NS lookup to take
	   place; assuming that domain has an NS of "ns0.bar.com", that will cause a lookup of
	   "bar.com.uriblzone.net".  Note that hostnames are stripped from both the domain used
	   in the URI, and the domain in the lookup.

	   "NAME_OF_RULE" is the name of the rule to be used, "rhsbl_zone" is the zone to look up
	   domain names in, and "lookuptype" is the type of lookup (TXT or A).

	   Note that, as with "urirhsbl", you must also define a body-eval rule calling
	   "check_uridnsbl()" to use this.

       urinsrhssub NAME_OF_RULE rhsbl_zone lookuptype subtest
	   Specify a RHSBL-style domain-NS lookup, as above, with a sub-test.  "NAME_OF_RULE" is
	   the name of the rule to be used, "rhsbl_zone" is the zone to look up domain names in,
	   and "lookuptype" is the type of lookup (TXT or A).  "subtest" is the sub-test to run
	   against the returned data; see <urirhssub>.

	   Note that, as with "urirhsbl", you must also define a body-eval rule calling
	   "check_uridnsbl()" to use this.

       urifullnsrhsbl NAME_OF_RULE rhsbl_zone lookuptype
	   Perform a RHSBL-style domain lookup against the contents of the NS records for each
	   URI.  In other words, a URI using the domain "foo.com" will cause an NS lookup to take
	   place; assuming that domain has an NS of "ns0.bar.com", that will cause a lookup of
	   "ns0.bar.com.uriblzone.net".  Note that hostnames are stripped from the domain used in
	   the URI.

	   "NAME_OF_RULE" is the name of the rule to be used, "rhsbl_zone" is the zone to look up
	   domain names in, and "lookuptype" is the type of lookup (TXT or A).

	   Note that, as with "urirhsbl", you must also define a body-eval rule calling
	   "check_uridnsbl()" to use this.

       urifullnsrhssub NAME_OF_RULE rhsbl_zone lookuptype subtest
	   Specify a RHSBL-style domain-NS lookup, as above, with a sub-test.  "NAME_OF_RULE" is
	   the name of the rule to be used, "rhsbl_zone" is the zone to look up domain names in,
	   and "lookuptype" is the type of lookup (TXT or A).  "subtest" is the sub-test to run
	   against the returned data; see <urirhssub>.

	   Note that, as with "urirhsbl", you must also define a body-eval rule calling
	   "check_uridnsbl()" to use this.

       tflags NAME_OF_RULE ips_only
	   Only URIs containing IP addresses as the "host" component will be matched against the
	   named "urirhsbl"/"urirhssub" rule.

       tflags NAME_OF_RULE domains_only
	   Only URIs containing a non-IP-address "host" component will be matched against the
	   named "urirhsbl"/"urirhssub" rule.

ADMINISTRATOR SETTINGS
       uridnsbl_max_domains N	     (default: 20)
	   The maximum number of domains to look up.

NOTES
       The "uridnsbl_timeout" option has been obsoleted by the "rbl_timeout" option.  See the
       "Mail::SpamAssassin::Conf" POD for details on "rbl_timeout".

perl v5.16.3				    2011-06-06	  Mail::SpamAssassin::Plugin::URIDNSBL(3)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 09:24 PM.