mirror of
https://github.com/mail-in-a-box/mailinabox.git
synced 2024-11-27 03:07:04 +00:00
101 lines
3.4 KiB
Diff
101 lines
3.4 KiB
Diff
|
Description: whitelist whatever dnswl.org whitelists
|
||
|
|
.
|
||
|
|
postgrey (1.35-1+miab1) unstable; urgency=low
|
||
|
|
.
|
||
|
|
* Added DNSWL.org whitelisting.
|
||
|
|
Author: Joshua Tauberer <jt@occams.info>
|
||
|
|
|
||
|
|
--- postgrey-1.35.orig/README
|
||
|
|
+++ postgrey-1.35/README
|
||
|
|
@@ -13,7 +13,7 @@ Requirements
|
||
|
|
- BerkeleyDB (Perl Module)
|
||
|
|
- Berkeley DB >= 4.1 (Library)
|
||
|
|
- Digest::SHA (Perl Module, only for --privacy option)
|
||
|
|
-
|
||
|
|
+- Net::DNS (Perl Module)
|
||
|
|
|
||
|
|
Documentation
|
||
|
|
-------------
|
||
|
|
--- postgrey-1.35.orig/postgrey
|
||
|
|
+++ postgrey-1.35/postgrey
|
||
|
|
@@ -18,6 +18,7 @@ use Fcntl ':flock'; # import LOCK_* cons
|
||
|
|
use Sys::Hostname;
|
||
|
|
use Sys::Syslog; # used only to find out which version we use
|
||
|
|
use POSIX qw(strftime setlocale LC_ALL);
|
||
|
|
+use Net::DNS; # for DNSWL.org whitelisting
|
||
|
|
|
||
|
|
use vars qw(@ISA);
|
||
|
|
@ISA = qw(Net::Server::Multiplex);
|
||
|
|
@@ -26,6 +27,8 @@ my $VERSION = '1.35';
|
||
|
|
my $DEFAULT_DBDIR = '/var/lib/postgrey';
|
||
|
|
my $CONFIG_DIR = '/etc/postgrey';
|
||
|
|
|
||
|
|
+my $dns_resolver = Net::DNS::Resolver->new;
|
||
|
|
+
|
||
|
|
sub cidr_parse($)
|
||
|
|
{
|
||
|
|
defined $_[0] or return undef;
|
||
|
|
@@ -48,6 +51,36 @@ sub cidr_match($$$)
|
||
|
|
return ($addr & $mask) == $net;
|
||
|
|
}
|
||
|
|
|
||
|
|
+sub reverseDottedQuad {
|
||
|
|
+ # This is the sub _chkValidPublicIP from Net::DNSBL by PJ Goodwin
|
||
|
|
+ # at http://www.the42.net/net-dnsbl.
|
||
|
|
+ my ($quad) = @_;
|
||
|
|
+ if ($quad =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/) {
|
||
|
|
+ my ($ip1,$ip2,$ip3,$ip4) = ($1, $2, $3, $4);
|
||
|
|
+ if (
|
||
|
|
+ $ip1 == 10 || #10.0.0.0/8 (10/8)
|
||
|
|
+ ($ip1 == 172 && $ip2 >= 16 && $ip2 <= 31) || #172.16.0.0/12 (172.16/12)
|
||
|
|
+ ($ip1 == 192 && $ip2 == 168) || #192.168.0.0/16 (192.168/16)
|
||
|
|
+ $quad eq '127.0.0.1' # localhost
|
||
|
|
+ ) {
|
||
|
|
+ # toss the RFC1918 specified privates
|
||
|
|
+ return undef;
|
||
|
|
+ } elsif (
|
||
|
|
+ ($ip1 <= 1 || $ip1 > 254) ||
|
||
|
|
+ ($ip2 < 0 || $ip2 > 255) ||
|
||
|
|
+ ($ip3 < 0 || $ip3 > 255) ||
|
||
|
|
+ ($ip4 < 0 || $ip4 > 255)
|
||
|
|
+ ) {
|
||
|
|
+ #invalid oct, toss it;
|
||
|
|
+ return undef;
|
||
|
|
+ }
|
||
|
|
+ my $revquad = $ip4 . "." . $ip3 . "." . $ip2 . "." . $ip1;
|
||
|
|
+ return $revquad;
|
||
|
|
+ } else { # invalid quad
|
||
|
|
+ return undef;
|
||
|
|
+ }
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
sub read_clients_whitelists($)
|
||
|
|
{
|
||
|
|
my ($self) = @_;
|
||
|
|
@@ -361,6 +394,25 @@ sub smtpd_access_policy($$)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
+ # whitelist clients in dnswl.org
|
||
|
|
+ my $revip = reverseDottedQuad($attr->{client_address});
|
||
|
|
+ if ($revip) { # valid IP / plausibly in DNSWL
|
||
|
|
+ my $answer = $dns_resolver->send($revip . '.list.dnswl.org');
|
||
|
|
+ if ($answer && scalar($answer->answer) > 0) {
|
||
|
|
+ my @rrs = $answer->answer;
|
||
|
|
+ if ($rrs[0]->type eq 'A' && $rrs[0]->address ne '127.0.0.255') {
|
||
|
|
+ # Address appears in DNSWL. (127.0.0.255 means we were rate-limited.)
|
||
|
|
+ my $code = $rrs[0]->address;
|
||
|
|
+ if ($code =~ /^127.0.(\d+)\.([0-3])$/) {
|
||
|
|
+ my %dnswltrust = (0 => 'legitimate', 1 => 'occasional spam', 2 => 'rare spam', 3 => 'highly unlikely to send spam');
|
||
|
|
+ $code = $2 . '/' . $dnswltrust{$2};
|
||
|
|
+ }
|
||
|
|
+ $self->mylog_action($attr, 'pass', 'client whitelisted by dnswl.org (' . $code . ')');
|
||
|
|
+ return 'DUNNO';
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
# auto whitelist clients (see below for explanation)
|
||
|
|
my ($cawl_db, $cawl_key, $cawl_count, $cawl_last);
|
||
|
|
if($self->{postgrey}{awl_clients}) {
|