Date: Thu, 5 Jul 2007 17:08:17 +0200 From: Max Laier <max@love2party.net> To: freebsd-pf@freebsd.org Subject: Re: Losing connections/performance with PF turned on Message-ID: <200707051708.24137.max@love2party.net> In-Reply-To: <810a540e0707050222s55a62641je0138e931832e86@mail.gmail.com> References: <810a540e0707050222s55a62641je0138e931832e86@mail.gmail.com>
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--nextPart1387552.7bBZdNJTva Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thursday 05 July 2007, Pat Maddox wrote: > We're doing some stress testing on our server, and noticed that when > we turn PF on, we lose connections and have a drastic reduction in > performance. My guess would be that you are exhausting the ephemeral port range of the=20 querying box. pf has quite strict (maybe too strict) enforcement of the=20 TIME_WAIT silence periode. There are several ways to work around this=20 (which only is a problem while benchmarking): - use shorter state timeouts. "tcp.closed" in particular - increase the ephemeral port range on the query node net.inet.ip.portrange.[hi]{last,first} see ip(4) for details. - Use a more realistic benchmark (i.e. coming from more than one IP) In order to verify that this is indeed the problem look for state-mismatch= =20 counter increases in the "pfctl -si" output or debug messages on the=20 console while running with "pfctl -xm". > We used SIEGE for 120 seconds, 50 connections, on req/conn > > Firewall On: > > Num Users: 50 > Availability: 97.23 % > Transaction rate: 58.02 trans/sec > Concurrency: 3.80 > Successful: 6994 > Failed: 198 > Longest Req: 9.06s > > Firewall Off: > > Num Users: 50 > Availability: 100 % > Transaction rate: 94.62 trans/sec > Concurrency: 1.76 > Successful: 11342 > Failed: 0 > Longest Req: 0.51s =2E.. =2D-=20 =46reeBSD Status reports due: 07/07/07 :-) /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News --nextPart1387552.7bBZdNJTva Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQBGjQloXyyEoT62BG0RAt0qAJ460qwrJPvDODa2/HoWV0GndI7aXQCbB6j+ B7m0YVs2mHORAvZbGwEgNFM= =G096 -----END PGP SIGNATURE----- --nextPart1387552.7bBZdNJTva--
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