Messages in this thread | | | Date | Sun, 4 Feb 2007 17:56:55 -0500 | From | "Parag Warudkar" <> | Subject | Re: Unexpected Acknowledgement / Stalled Connections |
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On 2/4/07, Parag Warudkar <parag.warudkar@gmail.com> wrote: > I am running 2.6.20 and have trouble with stalled connections. For > instance, if I try to download a debian ISO image using wget, the > connection runs fine for few seconds and then stalls for ever. > > In my router logs I see a ton of messages like the below - > > [INFO] Sun Feb 04 17:22:03 2007 Blocked incoming TCP packet from > 192.168.0.174:34090 to 130.239.18.138:80 with unexpected > acknowledgement 3269301836 (expected 3269343453 to 3269408989) > > Where 192.168.0.174 is my laptop running FC6 and kernel 2.6.20 and > 130.239.18.138 is whatever cdimage.debian.org resolves to atm. > > What's going on here? Any TCP/IP tunable that I can set/turn on/off to > prevent this from happening?
Turning tcp_sack off seems to cure it. Turning it on again makes the connections stall. Seems like the D-Link router doesn't like the SACKs linux sends?
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