Re: FIN_WAIT_2 timeout

From: Pavel Gulchouck (gul_at_gul.kiev.ua)
Date: 08/24/04

  • Next message: Andre Oppermann: "Re: kern/15095: TCP's advertised window is not scaled immediately upon discovering use of Window scale option" 
    Date: Tue, 24 Aug 2004 16:15:32 +0300
To: Richard Wendland <richard@codeburst.co.uk>

    On Tue, Aug 24, 2004 at 12:29:42PM +0100, Richard Wendland writes:
    > >> http://httpd.apache.org/docs/misc/fin_wait_2.html says that FreeBSD
    > >> has a timeout for FIN_WAIT_2 state, but I don't see it.
    >>
    >> Very strange...

    RW> This is somewhat similar to a problem I explained a few months back:

    RW> http://www.mail-archive.com/freebsd-net@freebsd.org/msg11857.html

    RW> where a 10 minute keepalive from a Novell system defeated the FreeBSD
    RW> 11min 15 sec FIN_WAIT timeout. This situation is a bit different as
    RW> FreeBSD is the server rather than the client. I wonder if 195.248.160.78
    RW> is a Novell system?

    RW> If it is similar, there's no real bug in the FreeBSD TCP stack, but the
    RW> far end is acting strangely with an abnormally fast keepalive.

    RW> It would be worth tcpdumping 195.248.160.78 traffic on those ports for
    RW> 30 mins or so to see if it is simply doing keepalives more frequently
    RW> that 12 mins.

    tcpdumping for 30 min shows now traffic from 195.248.160.78,
    only traffic to this host. 

    -- 
                                Lucky carrier,
                                                  Pavel.
_______________________________________________
freebsd-net@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-net
To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
  • Next message: Andre Oppermann: "Re: kern/15095: TCP's advertised window is not scaled immediately upon discovering use of Window scale option"