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Thread: Firewall rule for my zimbra

  1. #1
    mvalenzuela.cl is offline Senior Member
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    Default Firewall rule for my zimbra

    I have a doubt with a firewall rule for my zimbra. Now I have next rules in my Firewall :
    This Firewall is shorewall

    Part of my files /etc/shorewall/rules

    #ACTION SOURCE DEST PROTO DEST SOURCE ORIGINAL RATE

    DNAT net dmz:10.8.1.10 tcp http - IP_public
    DNAT net dmz:10.8.1.10 tcp 25 - IP_public
    DNAT net dmz:10.8.1.10 tcp 110 - IP_public
    DNAT net dmz:10.8.1.10 tcp 143 - IP_public

    I really think the port 25 must be closed to net interface, but if I apply that rule not receive emails from other email servers, I only receive mail from the same mail server.

    As I set a rule for my server to receive email from other servers have port 25 closed?.

    I do not understand how it affects the port 25 to receiving mail from other servers in zimbra, in sendmail did not have this problem, it sure is a mistake of mine, but I do not understand.

    Saludos

  2. #2
    ArcaneMagus's Avatar
    ArcaneMagus is offline Moderator
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    Default

    Port 25 is the SMTP port... which virtually ALL mail is communicated by, so obviously blocking it will block all incoming mail. I am not sure how sendmail did not use that...

  3. #3
    mvalenzuela.cl is offline Senior Member
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    Ok, I can Understand

    Thaks you!

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