Messages in this thread |  | | Date | Mon, 09 Oct 2000 12:05:08 -0700 | From | David Ford <> | Subject | Re: Weird IP options |
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Known FAQ, not a problem.
You compiled ECN into your kernel and a lot of sites out on the internet have a broken stack implementation.
echo 0 > /proc/sys/net/ipv4/tcp_ecn
-d
BERNARD Sebastien wrote:
> Near the test3-4 kernel, I was not able to reach www.linuxtoday.com. > After some debug, I find that is because my linux box is emitting syn packet > with some really strange options (description of packet follows). > Can anyone tell me if this behaviour is normal or not ? > > Here is the dialog from linuxtoday. > > 18:55:09.979659 eth0 > x.x.x.5.45762 > 63.236.72.248.www: S [ECN-Echo,CWR] > 40 > 82580514:4082580514(0) win 5840 <mss 1460,sackOK,timestamp 27634996 > 0,nop,wscale > 0> (DF) > 18:55:10.166933 eth0 < 63.236.72.248.www > x.x.x.5.45762: R 0:0(0) ack > 408258 > 0515 win 5840 <mss 1460,sackOK,timestamp 27634996 0,nop,wscale 0> > > It goes on like this a few times but it's not really useful. > > The packet is syn and the response is rst. > I suspect the server/firewall/router to dislike the option of the packet. > By the way this connection works perfectly with a windows server and a > linux2.2 box. > This problem is happening with other sites like www.sun.com, www.ibm.com, > www.intel.com. > > PLEASE HELP !!! > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > Please read the FAQ at http://www.tux.org/lkml/
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