From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?D=E2niel?= Fraga Subject: Re: [PATCH] tcp FRTO: in-order-only "TCP proxy" fragility workaround Date: Sun, 24 Aug 2008 16:38:43 -0300 Message-ID: <20080824163843.33b4f890@tux> References: <20080819213417.45133573@tux> <20080822183224.2d52f16c@tux> <20080822.143709.65615512.davem@davemloft.net> <20080823111446.06a350a2@tux> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: David Miller , thomas.jarosch@intra2net.com, billfink@mindspring.com, Netdev , Patrick Hardy , netfilter-devel@vger.kernel.org, kadlec@blackhole.kfki.hu To: "Ilpo =?ISO-8859-1?Q?J=E4rvinen?=" Return-path: In-Reply-To: Sender: netfilter-devel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Sat, 23 Aug 2008 17:38:32 +0300 (EEST) "Ilpo J=E4rvinen" wrote: > Thanks for verifying it! Ops! i replied too fast! I just got a stalled connection again! Important: these files were generated with the HTB patches applied. Here are botch tcpdump files: http://www.abusar.org/htb/dump-mail-server.log http://www.abusar.org/htb/dump-mail-client.log Both readmibs: http://www.abusar.org/htb/readmibs-server.txt http://www.abusar.org/htb/readmibs-client.txt Here are both cat /proc/net/tcp: http://www.abusar.org/htb/tcp-server.txt http://www.abusar.org/htb/tcp-client.txt I use the following to generate those dumps: 1) on the server: tcpdump -s 0 -w dump-mail-server.log -i eth0 host 201.52.214.230 2) on the client: tcpdump -s 0 -w dump-mail-client.log -i eth0 host teleporto.abusar.org = and port 995 What happened? 1) the connection was stalled 2) these tcpdumps are the *best ones* I got because although I started = them with the connection already stalled, the connection suddenly is not stalled = anymore, and a few minutes later was stalled again... 3) I keep tcpdump running for more time =09 Ps: anyway I could notice that the only two services that remain stalled is nntp, ftp, pop3 and smtp... http is never stalled, neither ssh. It seems to affect only "old" protocols :) Ps2: anyway, the htb patch seems to help, because the problem took much longer to happen. With htb patches the problem happens one ti= me a day.=20 Without the htb patches the problem happens more than one time a day. Ps3: I really doesn't understand why "nmap -sS server" "solves" the stalled connection issue. Ps4: sorry for my hurry feedback before. I thought the problem had gon= e. Anyway,=20 I hope this time I provided the best data for you. Thanks. --=20 -- To unsubscribe from this list: send the line "unsubscribe netfilter-dev= el" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html