Apache::AntiSpam::SpamTrap - Add SpamTrap suffix to local-part in Email
# in httpd.conf <Location /antispam> SetHandler perl-script PerlAddVar Key 0123456789ABCDEF PerlHandler Apache::AntiSpam::SpamTrap </Location> # filter aware PerlModule Apache::Filter SetHandler perl-script PerlSetVar Filter On PerlHandler Apache::RegistryFilter Apache::AntiSpam::SpamTrap Apache::Compress
Apache::AntiSpam::SpamTrap is a subclass of Apache::AntiSpam, filter module to prevent e-mail addresses exposed as is on web pages. This module adds a Blowfish encrypted string suffix to the local-part of e-mail addresses. This string contains a timestamp and the IP address of the remote host. This enables you to identify a spammer's address harvester by its IP address and take steps to prosecute him.
The encryption prevents faking and may help in a prosecuting attemp.
For example, apleiner@cpan.org will be filtered to apleiner-78c1ed6da0322b3a@cpan.org.
apleiner@cpan.org
apleiner-78c1ed6da0322b3a@cpan.org
This module is Filter aware, meaning that it can work within Apache::Filter framework without modification.
You need to give the Blowfish key in your Apache configuration file.
To decode a received mail's SpamTrap string use the following function:
sub spamtrap_decode { my ($string, $key) = @_; return unless $key; return unless $string =~ /[0-9a-f]{16}/o; my $inkey = pack("H16", $key); use Crypt::Blowfish; my $cipher = new Crypt::Blowfish $inkey; my $plaintext = $cipher->decrypt(pack("H*", $string)); my $time = unpack("L", substr($plaintext, 4, 4)); my $ip = join(".", map { ord } split //, substr($plaintext, 0, 4)); return wantarray ? ($ip, $time) : "$ip $time"; }
should make local address part be configured.
Alex Pleiner <alex@zeitform.de> - zeitform Internet Dienste 2003
This work is based on the Apache::AntiSpam::* modules provided by Tatsuhiko Miyagawa <miyagawa@bulknews.net>. The idea is taken from Daniel A. Rehbein (http://daniel.rehbein.net/).
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Apache::AntiSpam
To install Apache::AntiSpam::SpamTrap, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Apache::AntiSpam::SpamTrap
CPAN shell
perl -MCPAN -e shell install Apache::AntiSpam::SpamTrap
For more information on module installation, please visit the detailed CPAN module installation guide.