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# Crude direct-connect stopper
# written by Johan Almqvist
sub hook_connect {
        my ($self, $transaction) = @_;
        my $remote_ip = $self->qp->connection->remote_ip;
        my $remote_host = $self->qp->connection->remote_host;
        my $reverse_remote_ip = join (".", reverse(split(/\./,$remote_ip)));
        if ($remote_ip eq $remote_host) {
                return (DENYSOFT, "Reverse DNS lookup for $remote_ip failed.");
        }
        elsif (($remote_host =~ /$reverse_remote_ip/)
                        || ($remote_host =~ /$remote_ip/)
                        || ($remote_host =~ /\.dsl\./)
                        || ($remote_host =~ /\.adsl\./)
                        || ($remote_host =~ /\.ppp\./)
                        || ($remote_host =~ /\.dhcp\./)
                        || ($remote_host =~ /\.dynamicIP\./)
                        || ($remote_host =~ /\.dynamic\./)
                        || ($remote_host =~ /\.dip\./i)
                        || ($remote_host =~ /\.abo\.wanadoo\.fr/i)
                        || ($remote_host =~ /\.pool\./))  {
                return (DENY, "Sorry, $remote_host ($remote_ip) seems to ".
                        "be a dialup, use your ISP's SMTP server");
        }
        else {  
                return DECLINED;
        }
}