SMTP and SMTP/s Maximum new connections per host per second



  • pfsense x64 2.2.2

    Hi,

    I'm trying to figure out what a good setting is for this on a firewall rule - limiting the number of SMTP and SMTP/s connections per second.  I've read a bit and it seems that there isn't a clear answer on this.

    Firewall Rule > Advanced Options > Maximum new connections per host / per second:  ?

    What is a decent rate for honest senders?  :-)

    I've got these modules installed and configured already:

    snort with a bunch of rules
    postfix forwarder
    mailscanner

    …perhaps one of those already does this, not sure.  The more protection I can put in front the better!

    Thanks!


  • Banned

    If you already have Snort… check this and see how it flies...

    http://doc.emergingthreats.net/bin/view/Main/WhatEveryIDSUserShouldDo#Multiple_Inbound_SMTP


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