This plugin looks up the connecting IP address in an IP whitelist. If the host is listed, then the plugin will return OK for all hooks up to hook_data.

IMPORTANT! The order of plugins in config/plugins is important when this plugin is used. It should be listed before any plugins that you wish to skip, but after any plugins that accept recipients.


This plugins uses the following files:

dnswl.zones - Contains a list of zones to query, one per line.

dnswl.ini - INI format with options described below:

  • zones

    A comma or semi-colon list of zones to query. It will be merged with any lists in dnswl.zones.

  • periodic_checks

    If enabled, this will check all the zones every n minutes. The minimum value that will be accepted here is 5. Any value less than 5 will cause the checks to be run at start-up only.

    The checks confirm that the list is responding and that it is not listing the world. If any errors are detected, then the zone is disabled and will be re-checked on the next test. If a zone subsequently starts working correctly then it will be re-enabled.

  • enable_stats

    To use this feature you must have installed the ‘redis’ module and have a redis server running.

    When enabled, this will record several list statistics to redis.

    It will track the total number of queries (TOTAL) and the average response time (AVG_RT) and the return type (e.g. LISTED or ERROR) to a redis hash where the key is ‘dns-list-stat:zone’ and the hash field is the response type.

    It will also track the positive response overlap between the lists in another redis hash where the key is ‘dns-list-overlap:zone’ and the hash field is the other list names.


    redis> hgetall dns-list-stat:zen.spamhaus.org
      1) "TOTAL"
      2) "23"
      3) "ENOTFOUND"
      4) "11"
      5) "LISTED"
      6) "12"
      7) "AVG_RT"
      8) "45.5"
      redis> hgetall dns-list-overlap:zen.spamhaus.org
      1) "b.barracudacentral.org"
      2) "1"
      3) "bl.spamcop.net"
      4) "1"
      5) "TOTAL"
      6) "1"
  • stats_redis_host

    In the form of host:port this option allows you to specify a different host on which redis runs.