From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,1a1fea84eb4ab4c2 X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news2.google.com!news.glorb.com!feed.xsnews.nl!feeder.xsnews.nl!proxad.net!cleanfeed3-a.proxad.net!nnrp20-1.free.fr!not-for-mail Sender: sam@willow.rfc1149.net From: Samuel Tardieu Newsgroups: comp.lang.ada Subject: Re: Libre site down, again References: <1160820433.720424.183840@e3g2000cwe.googlegroups.com> <45312652.6030900@obry.net> <4531E523.2030802@obry.net> <87irijjehd.fsf@gnou.ramonat.fr> <1161102935.771738.42820@e3g2000cwe.googlegroups.com> Date: 17 Oct 2006 22:22:38 +0200 Message-ID: <87bqoavgj5.fsf@willow.rfc1149.net> User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Leafnode-NNTP-Posting-Host: 2001:6f8:37a:2::2 Organization: Guest of ProXad - France NNTP-Posting-Date: 17 Oct 2006 22:25:09 MEST NNTP-Posting-Host: 88.191.14.223 X-Trace: 1161116709 news-2.free.fr 16080 88.191.14.223:39234 X-Complaints-To: abuse@proxad.net Xref: g2news2.google.com comp.lang.ada:7017 Date: 2006-10-17T22:25:09+02:00 List-Id: >>>>> "Seth" == deadlyhead writes: Seth> The strange thing is, running a 2.6.16 kernel as I am now, Seth> tcp_window_scaling is set to 1, but I can access libre just Seth> fine. Makes me wish I knew more about the Linux kernel. Time Seth> to get serious about AdaOS, I suppose. Let's get this straight though: this is *not* a Linux bug. However, some broken boxes and routers do not correctly handle TCP window scaling. TCP window scaling is important to get the maximum throughput on TCP connections. If you run a Linux kernel 2.6.18-rc5 or above (such as 2.6.18), you can work around this problem for specific sites (rather than hurting TCP performances globally using the aforementionned sysctl) by doing: # route add -net 212.157.227.0 netmask 255.255.255.0 gw 192.168.0.254 window 65535 (all on one line, replace 192.168.0.254 with your default router address) Also note that TCP window scaling has been defined in RFC 1323 back in 1992... Sam -- Samuel Tardieu -- sam@rfc1149.net -- http://www.rfc1149.net/