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Joined: 23 Jan 2003
Posts: 256
Location: India
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 Posted: Fri Sep 09, 2005 6:48 am Post subject: Track Spam From PHP and Perl Scripts |
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When you are running PHP and Perl Scripts as user nobody, it is impossible to track scripts that send spam emails. Here is a hack that allow you to track abusers.
Step 1
Login to server and create file for loging
| Code: | touch /var/log/sendmail_log
chmod 0777 /var/log/sendmail_log |
Step 2
Rename /usr/sbin/sendmail to /usr/sbin/sendmail.hidden
| Code: |
mv /usr/sbin/sendmail /usr/sbin/sendmail.hidden
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Step 3
create a file /usr/sbin/sendmail
| Code: | | vi /usr/sbin/sendmail |
with Following content
| Code: |
#!/usr/local/bin/perl
# use strict;
use Env;
my $date = `date`;
chomp $date;
open (INFO, ">>/var/log/sendmail_log") || die "Failed to open file ::$!";
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);
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Step 4
Make /usr/sbin/sendmail executable by everyone
| Code: | | chmod +x /usr/sbin/sendmail |
Step 5
Prevent overwriting the file /usr/sbin/sendmail
| Code: | | chattr +i /usr/sbin/sendmail |
Step 6
Finished, now you can see the log file at /var/log/sendmail_log
| Code: | | tail -f /var/log/sendmail_log |
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