You probably have the ECN bit set in your networking. I ran into a similar problem when I switched to 2.4 kernel.
See http://urchin.earth.li/ecn/ for more information. Randy On Mon, 2001-10-08 at 04:22, Jean-Paul Smets wrote: > Hi, > > I have a debian/woody + some sid packages which includes a very strange issue. > Whenever I connect to certain site with opera, netscape, konqueror, lynx or > links, I never get an ackgowledge packet. Therefore, the http connection > always fail with a "no answer" kind of message. The sites which show this > behaviour are > www.sun.com > www.zdnet.com > www.voyages-sncf.com > www.canon.co.jp > > In order to try to understand, I set up a tcpdump on my NAT firewall : > > Here is what happens when I use a debian system (192.168.0.100) > > 20:41:43.019608 192.168.0.100.4271 > www.sun.com.www: SWE > 1044463694:1044463694(0) win 5840 <mss 1460,sackOK,timestamp 8529418 > 0,nop,wscale 0> (DF) > 0x0000 4500 003c 5d9b 4000 4006 fa10 c0a8 0064 E..<[EMAIL > PROTECTED]@......d > 0x0010 c012 61f1 10af 0050 3e41 404e 0000 0000 ..a....P>[EMAIL > PROTECTED] > 0x0020 a0c2 16d0 974c 0000 0204 05b4 0402 080a .....L.......... > 0x0030 0082 260a 0000 0000 0103 0300 ..&......... > > Here is what happens with a Windows machine connected to the same NAT > firewall : > > 20:42:02.203155 192.168.0.101.1782 > www.sun.com.www: S 39886669:39886669(0) > win 8192 <mss 1460,nop,nop,sackOK> (DF) > 0x0000 4500 0030 4144 4000 8006 d672 c0a8 0065 [EMAIL PROTECTED] > 0x0010 c012 61f1 06f6 0050 0260 9f4d 0000 0000 ..a....P.`.M.... > 0x0020 7002 2000 d71a 0000 0204 05b4 0101 0402 p............... > 20:42:02.396883 www.sun.com.www > 192.168.0.101.1782: S > 109390000:109390000(0) ack 39886670 win 64240 <mss 1460> > 0x0000 4500 002c c755 0000 eb06 2565 c012 61f1 E..,.U....%e..a. > 0x0010 c0a8 0065 0050 06f6 0685 28b0 0260 9f4e ...e.P....(..`.N > 0x0020 6012 faf0 e1ea 0000 0204 05b4 > > Here is what happens with the same debian system connecting to www.apple.com > > 22:06:09.023187 192.168.0.100.4370 > www.apple.com.www: SWE > 2111225404:2111225404(0) win 5840 <mss 1460,sackOK,timestamp 9035972 > 0,nop,wscale 0> (DF) [tos 0x10] > 0x0000 4510 003c 5ef8 4000 4006 084f c0a8 0064 E..<[EMAIL > PROTECTED]@..O...d > 0x0010 11fe 005b 1112 0050 7dd6 be3c 0000 0000 ...[...P}..<.... > 0x0020 a0c2 16d0 2e4f 0000 0204 05b4 0402 080a .....O.......... > 0x0030 0089 e0c4 0000 0000 0103 0300 ............ > 22:06:09.249325 www.apple.com.www > 192.168.0.100.4370: S > 1063183829:1063183829(0) ack 2111225405 win 32768 <mss 512,nop,wscale > 0,nop,nop,timestamp 6565777 9035972> > 0x0000 4500 003c 029b 0000 2e06 b6bc 11fe 005b E..<...........[ > 0x0010 c0a8 0064 0050 1112 3f5e e5d5 7dd6 be3d ...d.P..?^..}..= > 0x0020 a012 8000 7759 0000 0204 0200 0103 0300 ....wY.......... > 0x0030 0101 080a 0064 2f91 0089 e0c4 .....d/..... > > Obviously, only when connecting to www.sun.com from the debian system, I get > no reply. I tried on all my debian machines : same problem. Some sites such > as sun, zdnet or voyages-sncf.com do not seem reply. Most other sites work > perfectly. > > I tried also on a friend's debian system (woody/sid). Everything got fine for > him including sun and zdnet. > > Does anyone have an idea ? How should I proceed to understand what is > happening ? > > Regards, > > JPS. > > > -- > Jean-Paul Smets-Solanes <[EMAIL PROTECTED]> > GPG Fingerprint: 40FF FA78 75AA 680D 8BB4 EEF9 539A 79CC CB8E 5F01 > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > >
