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  1. #1

    CSF SMTP_BlOCK not working

    In my VPS (cpanel/WHM) spam mail were sent by using perl scripts ( like darkmailer ) by hackers ,to stop this i have enabled SMTP_BLOCK option in CSF firewall ( by loading ipt_owner module).Eventhough i enabled SMTP_BLOCK option the spam mails were sent using perl script.I got the following alert from CSF :



    Command Line (often faked in exploits):

    /usr/bin/perl -w

    Network connections by the process (if any):

    tcp: xx.xx.xx.xx:60982 ->

    The CSF does't stop the spam mails and so my VPS IP gets listed in email blacklists (like,SORBS-SPAM),What can i do to stop these spams ?

  2. #2
    Join Date
    Oct 2004
    Kerala, India
    When you turn on SMTP_BLOCK the outbound localhost connection to port 25 is blocked. Try to send a mail from shell and see if it is delivering fine.
    David |
    Affordable Server Management Solutions sales AT cliffsupport DOT com
    CliffWebManager | Access WHM from iPhone and Android

  3. #3
    Thanks for you reply....

    From shell the mail is delivering fine and it goes via exim ,the exim log entry looks like

    2009-08-06 17:13:25 cwd=/ 3 args: send-mail -i [email protected]
    2009-08-06 17:13:25 1MZ1NV-0003A2-8D <= [email protected] U=root P=local S=574 T="test"
    2009-08-06 17:13:36 1MZ1NV-0003A2-8D => [email protected] R=lookuphost T=remote_smtp H=test [xx.xx.xx.xx] X=TLSv1:AES256-SHA:256

  4. #4
    Join Date
    May 2009
    On a Speck!!!!!
    Check whether port 26 is enables in the server. If so block both port 25 and 26 in the firewall.

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