Admin-Ahead Community
Linux => General Linux => Topic started by: nirmal on November 17, 2013, 12:46:26 pm
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Hi all,
How to catch nobody spammers?
Step 1) Turn off exim before proceeding
/etc/init.d/exim stop
Step 2) Backup your original /usr/sbin/sendmail file
mv /usr/sbin/sendmail /usr/sbin/sendmail.hidden
Step 3) Create the spam monitoring script for the new sendmail
vi /usr/sbin/sendmail
Paste in the following:
#!/usr/local/bin/perl
# use strict;
use Env;
my $date = `date`;
chomp $date;
open (INFO, ">>/var/log/spam_log") || die "Failed to open file ::$!";
my $uid = $>;
my @info = getpwuid($uid);
if($REMOTE_ADDR) {
print INFO "$date - $REMOTE_ADDR ran $SCRIPT_NAME at $SERVER_NAME n";
}
else {
print INFO "$date - $PWD - @infon";
}
my $mailprog = '/usr/sbin/sendmail.hidden';
foreach (@ARGV) {
$arg="$arg" . " $_";
}
open (MAIL,"|$mailprog $arg") || die "cannot open $mailprog: $!n";
while (<STDIN> ) {
print MAIL;
}
close (INFO);
close (MAIL);
Change the new sendmail permissions
chmod +x /usr/sbin/sendmail
Create a new log file to keep a history of all mail going out of the server using web scripts
touch /var/log/spam_log
chmod 0777 /var/log/spam_log
Start Exim
/etc/init.d/exim start
Monitor your spam_log file for spam
tail -f /var/log/spam_log