FWX_E_NO_BACKLOG_PACKET_DROPPED – What does that mean?

by Shijaz Abdulla on 29.11.2007 at 12:23

If you find that ISA Server 2004/2006 is denying connections, seemingly for no particular reason, and logs the following error:

FWX_E_NO_BACKLOG_PACKET_DROPPED

…it simply means that ISA Server does not have enough resources to do the logging. Check the CPU and hardware utilization. Also see if your disks are fast enough.

A workaround would be to disable logging for “high-volume” rules like SMTP and DNS.

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3 Responses to FWX_E_NO_BACKLOG_PACKET_DROPPED – What does that mean?

  1. Anonymous says:
    April 29, 2009 at 5:26 pm

    Hi,
    this one was really helpfull! Microsoft could, as usual, think of a little bit more precise Error messages.
    Your suggestion to disable logging for e.G. UDP Rules did the trick!
    And logging for such UDP rules is not really neccessary at all in our cases.

    Thank’s a lot!

  2. Stylus Pilot says:
    December 10, 2009 at 6:37 am

    I have this same issue,

    I have disabled all logging and it still occurs

    what else can it be?

  3. Shijaz says:
    January 1, 2010 at 9:33 am

    HI Stylus,

    Are you sure its the same error you have? This error only happens when there is too much traffic going thru the ISA Server that the logging can’t catch up. 🙂

    Shijaz

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