Mail::SpamAssassin::Plugin::URIDNSBL(category13-admin-isp-software.html) - phpMan

Mail::SpamAssassin::PlUser:Contributed)Mail::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 host
       names from those, then querying various DNS blocklists for either: IP
       addresses of these hosts (uridnsbl,a) or their nameservers
       (uridnsbl,ns), or domain names of these hosts (urirhsbl), or domain
       names of their nameservers (urinsrhsbl, urifullnsrhsbl).
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.
           This works by collecting domain names from URLs and querying DNS
           blocklists with an IP address of host names found in URLs or with
           IP addresses of their name servers, according to tflags as follows.
           If the corresponding body rule has a tflag 'a', the DNS blocklist
           will be queried with an IP address of a host found in URLs.
           If the corresponding body rule has a tflag 'ns', DNS will be
           queried for name servers (NS records) of a domain name found in
           URLs, then these name server names will be resolved to their IP
           addresses, which in turn will be sent to DNS blocklist.
           Tflags directive may specify either 'a' or 'ns' or both flags. In
           absence of any of these two flags, a default is a 'ns', which is
           compatible with pre-3.4 versions of SpamAssassin.
           The choice of tflags must correspond to the policy and expected use
           of each DNS blocklist and is normally not a local decision. As an
           example, a blocklist expecting queries resulting from an 'a' tflag
           is a "black_a.txt" ( http://www.uribl.com/datasets.shtml ).
           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
            tflags          URIBL_SBLXBL    net ns
       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).
           Tflags 'ns' and 'a' on a corresponding body rule are recognized and
           have the same meaning as in the uridnsbl directive.
           "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) && ((r & 0xff000000) == 0x7f000000), i.e. within
           127.0.0.0/8
           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) && ((r & 0xff000000) == 0x7f000000), i.e. within
           127.0.0.0/8
           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.
       tflags NAME_OF_RULE ns
           The 'ns' flag may be applied to rules corresponding to uridnsbl and
           uridnssub directives. Host names from URLs will be mapped to their
           name server IP addresses (a NS lookup followed by an A lookup),
           which in turn will be sent to blocklists. This is a default when
           neither 'a' nor 'ns' flags are specified.
       tflags NAME_OF_RULE a
           The 'a' flag may be applied to rules corresponding to uridnsbl and
           uridnssub directives. Host names from URLs will be mapped to their
           IP addresses, which will be sent to blocklists. When both 'ns' and
           'a' flags are specified, both queries will be performed.
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                      2014-Mail::SpamAssassin::Plugin::URIDNSBL(3)