On Tue, May 22, 2001 at 11:23:40PM +0100, mr matsui wrote: > I've got a problem where I cannot browse the web. I use a number of ISPs and > this problem occurs only for 1 of the ISP ( my main account). Using this > problem ISP I can still ping and resolve domain names, ftp and even telnet > to port 80 on internet hosts. When I use lynx to browse a web sits the > domain name is resolved and the text "HTTP request sent; waiting for > response" displays but no response arrives. Netscape and Opera have similar > problems. > > I must have done something stupid in the kernel compilation/iptables as it > is one of the few things I have changed recently (re-compiled 2.4.2). But I > find it hard to believe it is the setup as the other ISP work fine. > > I am really struggling with this, any ideas anybody. What should I look out > for in syslog/ps ax.... ? help ??? > > Debian 2.2r3, dell Inspiron 3500, no proxy setup/web cache ( that I am aware > of !) $ sysctl net.ipv4.tcp_ecn net/ipv4/tcp_ecn = 0 If you get net/ipv4/tcp_ecn = 1 that may be your problem. $ sysctl -w net.ipv4.tcp_ecn=0 will disable tcp_ecn. ECN ::= Explicit Congestion Notification. Some routers/firewalls don't know what to do with a TCP packet with the ECN bit set so they drop it. Wild ass guess :) Let us know how it turns out ... -- Nathan Norman - Staff Engineer | A good plan today is better Micromuse Ltd. | than a perfect plan tomorrow. mailto:nnorman@micromuse.com | -- Patton
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