NAME
App::DNS::Adblock - A lightweight DNS ad filter
VERSION
version 0.015
DESCRIPTION
This is an ad filter for use in a local area network. Its function is to load lists of ad domains and answer DNS queries for those domains with a loopback address. Any other DNS queries are forwarded upstream, either to a specified list of nameservers or to those listed in /etc/resolv.conf.
The module loads externally maintained lists of ad hosts intended for use by the adblock plus Firefox extension. Use of the lists focuses only on third-party listings that define dedicated advertising and tracking hosts.
A custom blacklist and/or whitelist can also be loaded. In this case, host listings must conform to a one host per line format.
Once running, local network dns queries can be addressed to the host's ip.
SYNOPSIS
my $adfilter = App::DNS::Adblock->new();
$adfilter->run();Without any parameters, the module will function simply as a proxy, forwarding all requests upstream to predefined nameservers.
ATTRIBUTES
adblock_stack
my $adfilter = App::DNS::Adblock->new(
adblock_stack => [
{
url => 'http://pgl.yoyo.org/adservers/serverlist.php?hostformat=adblockplus&showintro=0&startdate[day]=&startdate[month]=&startdate[year]=&mimetype=plaintext',
path => '/var/named/pgl-adblock.txt', #path to ad hosts
refresh => 7, #refresh value in days (default = 7)
},
{
url => 'abp:subscribe?location=https%3A%2F%2Feasylist-downloads.adblockplus.org%2Feasyprivacy.txt&title=EasyPrivacy&requiresLocation=https%3A%2F%2Feasylist-downloads.adblockplus.org%2Feasylist.txt&requiresTitle=EasyList';
path => '/var/named/easyprivacy.txt',
refresh => 5,
},
],
);The adblock_stack arrayref encloses one or more hashrefs composed of three parameters: a url that returns a list of ad hosts in adblock plus format; a path string that defines where the module will write a local copy of the list; a refresh value that determines what age (in days) the local copy may be before it is refreshed.
A collection of lists is available at http://adblockplus.org/en/subscriptions. The module will accept standard or abp:subscribe? urls. You can cut and paste encoded links directly.
blacklist
my $adfilter = App::DNS::Adblock->new(
blacklist => '/var/named/blacklist', #path to secondary hosts
);A path string that defines where the module will access a local list of ad hosts. A single column is the only acceptable format:
# ad nauseam
googlesyndication.com
facebook.com
twitter.com
...whitelist
my $adfilter = App::DNS::Adblock->new(
whitelist => '/var/named/whitelist', #path to exclusions
);A path string to a single column list of hosts. These hosts will be removed from the filter.
host, port
my $adfilter = App::DNS::Adblock->new( host => $host, port => $port );The IP address to bind to. If not defined, the server attempts binding to the local ip. The default port is 53.
forwarders, forwarders_port
my $adfilter = App::DNS::Adblock->new( forwarders => [ nameserver, ], forwarders_port => $port );An arrayref of one or more nameservers to forward any DNS queries to. Defaults to nameservers listed in /etc/resolv.conf. The default port is 53. Windows machines should define a forwarder to avoid the default behavior.
setdns
my $adfilter = App::DNS::Adblock->new( setdns => '1' ); #defaults to '0'If set, the module attempts to set local dns settings to the host's ip. This may or may not work if there are multiple active interfaces. You may need to manually adjust your local dns settings.
loopback
my $adfilter = App::DNS::Adblock->new( loopback => '127.255.255.254' ); #defaults to '127.0.0.1'If set, the nameserver will return this address rather than the standard loopback address.
debug
my $adfilter = App::DNS::Adblock->new( debug => '1' ); #defaults to '0'The debug option logs actions to stdout and can be set from 1-3 with increasing output: the module will feedback (1) adfilter.pm logging, (2) nameserver logging, and (3) resolver logging.
CAVEATS
Tested under darwin only.
AUTHOR
David Watson <dwatson@cpan.org>
SEE ALSO
scripts/ in the distribution
This module is essentially a lightweight, non-Moose version of Net::DNS::Dynamic::Adfilter
COPYRIGHT AND LICENSE
This library is free software, you can redistribute it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the LICENSE file included with this module.