Date: Tue, 14 Aug 2007 21:23:40 +0200 From: Patrick Proniewski <patpro@patpro.net> To: freebsd-pf@freebsd.org Cc: Greg Hennessy <Greg.Hennessy@nviz.net> Subject: Re: strange "throttling" issue with pf on xDSL connection Message-ID: <25950E32-2B7A-49C6-A6E0-98FFAB3574BE@patpro.net> In-Reply-To: <20070802062413.GB32306@insomnia.benzedrine.cx> References: <DE71F511-8553-401A-A16C-DF4CAA5DA6E3@patpro.net> <611A93D3-A392-493B-80ED-4C5AC77AA77A@patpro.net> <20070802062413.GB32306@insomnia.benzedrine.cx>
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Hi all, On 02 ao=FBt 2007, at 08:24, Daniel Hartmeier wrote: > On Wed, Aug 01, 2007 at 05:42:19PM +0200, Patrick Proniewski wrote: > >> While playing around with systat I've discovered that the transfer >> rate can be as low as 20 KB/s and as high as 850 KB/s on a single >> download from http://test-debit.free.fr, but the mean value will >> always be around 120-150 KB/s when pf is active. =46rom one sample to >> another (every second), the transfer rate is very erratic. >> If I disable pf on ext_if (set skip on $ext_if), the transfer rate >> reaches quickly 850 KB/s and is almost stable. It decreases to >> 400-450 KB/s for 1 or 2 seconds, 3 or 4 times per minute. > > Enable pf debug logging (pfctl -xm), note output of pfctl -si, =20 > reproduce > the problem. Then run pfctl -si again. See /var/log/messages for lines > from pf. Post all three outputs ;) logging and other forensic methods were of no help here, but I've =20 made several tests, commenting and un-commenting pf rules. I've found =20= the guilty piece of rule. my pf.conf used to have this rule: pass out on $ext_if proto tcp all modulate state flags S/SA I've changed options to: pass out on $ext_if proto tcp all flags S/SA keep state then my bandwidth is no longer throttled ! Looks like the servers/networks I'm connected to do not like =20 "modulate state". regards, pat=
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