Messages in this thread |  | | From | David Lang <> | Date | Tue, 30 Oct 2001 05:39:33 -0800 (PST) | Subject | Re: ipchains redirect failing in 2.4.5 (and 2.4.13) |
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I just confirmed that the problem still happens on 2.4.13.
I also confirmed that I can suplicate the problem without multiple simultanious connections. if I do ab -n 50 (50 connections as fast as an athlon 1.2GHz can fire them off) I get the same failure. If the connections arrive at a sufficiantly slow rate the redirect works (no idea yet what that rate is yet)
doing the test directly to the proxy port results in ~5 connections/second. I don't see any reason that this should be enough to cause problems.
David Lang
On Tue, 30 Oct 2001, David Lang wrote:
> Date: Tue, 30 Oct 2001 05:04:35 -0800 (PST) > From: David Lang <david.lang@digitalinsight.com> > To: linux-kernel@vger.kernel.org > Subject: ipchains redirect failing in 2.4.5 > > I am attempting to track down a problem I have run into with 2.4.5 > > I have a firewall that has proxies listening on ports 1433-1437. If I > connect to these proxies on these ports I have no problems, however if I > put in an ipchains rule to redirect port 1433 on a second IP address to > port 1436 (for example) and then hammer the box with ab -n 500 -s 20 the > first 20 or so connections get through and then the rest timeout. doing > repeated netstat -an on the firewall during this process shows an inital > burst of 15 connections that get established, a pause, and then a handfull > more get established, followed by those 20 connections being in TIME_WAIT > > again, connection to the same IP address on the real port the proxy is > listening on has no problems, it's only when going through the redirect > that it fails. > > any suggestions, tuning paramaters I missed, or tests I need to run to > track this down? > > David Lang > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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