Messages in this thread |  | | Date | Sun, 17 Nov 1996 09:37:14 -0800 (PST) | From | "B. James Phillippe" <> | Subject | Re: Networking troubles with 2.1.10 |
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On Sun, 17 Nov 1996, Ion Badulescu wrote:
> > Hi, > > I got these messages (along with many 'syn-ack rtx', but those are normal) > while working in a telnet session over a fast (<5ms) ethernet connection: > > Nov 16 20:12:22 moisil kernel: syn_ack rtx 1 > Nov 16 21:50:42 moisil kernel: syn timeout > Nov 16 21:51:21 moisil kernel: syn timeout > Nov 16 21:52:12 moisil last message repeated 3 times > Nov 16 21:53:02 moisil last message repeated 2 times > Nov 16 21:54:10 moisil kernel: syn timeout > Nov 16 21:55:19 moisil kernel: syn timeout > Nov 16 21:56:09 moisil kernel: syn timeout > Nov 16 22:45:20 moisil kernel: syn_ack rtx 1 > > More precisely, the machine had to send a large amount of data, once > because of a large copy_and_paste using the mouse, and once (the one > showed above) because of something scrolling quickly on the tty. In both > cases, the session got really stuck, (although I could open another telnet > just fine), and got under way several minutes later. netstat indicated > that the send-q was rather large - 23000 or something like that. During > that interval of 5-6 minutes, every now and then (most likely once > a minute, in sync with the syn timeout messages) several packets made it > through, but since the application was queuing more stuff, it didn't help > - the send-q stayed at or around 23000. > > Also, on a related issue, netstat was showing several incoming connections > (smtp and auth) in an UNKNOWN state, with send-q = recv_q = 1. Most of > them were more than 12 hours old, and seemed to have just stuck there. > They were definitely _not_ syn-flood traces, as 1. they originated from > different hosts; 2. those hosts were "trusted" (one being a machine > I have root on, and another being vger itself with a smtp connection); 3. > they were just a few (10-12) and didn't prevent in any way other > connections.
Thank you!! Someone who knows what I'm talking about. I posted a while ago with a very detail bug-description that inlcluded kernel build options, ipfwadm settings and a tcpdump session. Basically, this is all exactly what I get. In addition, IP forwarding/masquerading is broken and network speed (both ethernet and ppp) is very, very slow. I had to drop back to 2.0.25. I don't have much more to say than "Yes, this is a legitimate problem with 2.1.9+".
Thanks, -bp -- # B. James Phillippe # System Administrator <Terran.ORG> # <bryan@terran.org> # http://w3.terran.org/~bryan # Finger for PGP key # Member since 1.1.59
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