hii all, sorry for posting a kernel related query... but ill appreciate if someone could please help me out... i am running redhat linux 7.0 with kernel 2.2.16... i downloaded kernel 2.4.3 from web and compiled and booted through that... but strangely so, all my application level programs fail to run... i can ping to a machine, but i cant telnet/ftp/web... it says connection refused... any ideas? cheers mehul
What do you mean by all the applications? If you''re having problems with TCP based applications, it''s probably due to the ECN option on TCP. Turn it off, recompile the kernel and you should be OK. Ramin On Fri, Apr 20, 2001 at 05:47:04PM +0530, Mehul Vora wrote:> hii all, > > sorry for posting a kernel related query... but ill appreciate if someone could please help me out... > > i am running redhat linux 7.0 with kernel 2.2.16... i downloaded kernel 2.4.3 from web and compiled and booted through that... but strangely so, all my application level programs fail to run... i can ping to a machine, but i cant telnet/ftp/web... it says connection refused... any ideas? > > cheers > mehul
On Fri, 20 Apr 2001 08:20:57 -0400, you wrote:>What do you mean by all the applications? If you''re having problems >with TCP based applications, it''s probably due to the ECN option on >TCP. Turn it off, recompile the kernel and you should be OK. > >RaminAlso read /usr/src/linux/Documentation/Changes, because you''ll have to update some packets (apart from kernel) like modutils! If not all services using modules will fail. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=- ** RoMaN SoFt / LLFB ** roman@madrid.com http://pagina.de/romansoft ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Thus spake Ramin Alidousti:> What do you mean by all the applications? If you''re having problems > with TCP based applications, it''s probably due to the ECN option on > TCP. Turn it off, recompile the kernel and you should be OK.You can also add to /etc/sysctl.conf: # Disables explicit congestion notification net.ipv4.tcp_ecn = 0 And reload with ''sysctl -p''. (Or of course ''echo 0 > /proc/sys/net/ipv4/tcp_ecn'') No need to rebuild your kernel. Wil -- W. Reilly Cooley wcooley@nakedape.cc Naked Ape Consulting http://nakedape.cc LNXS: Linux/GNU for servers, networks, and http://lnxs.org people who take care of them. *Now with integrated crypto!* irc.openprojects.net #lnxs The penalty for laughing in a courtroom is six months in jail; if it were not for this penalty, the jury would never hear the evidence. -- H. L. Mencken
On Fri, Apr 20, 2001 at 01:03:46PM -0700, Wil Cooley wrote:> Thus spake Ramin Alidousti: > > What do you mean by all the applications? If you''re having problems > > with TCP based applications, it''s probably due to the ECN option on > > TCP. Turn it off, recompile the kernel and you should be OK. > > You can also add to /etc/sysctl.conf: > > # Disables explicit congestion notification > net.ipv4.tcp_ecn = 0 > > And reload with ''sysctl -p''. (Or of course ''echo 0 > > /proc/sys/net/ipv4/tcp_ecn'') No need to rebuild your kernel. > > Wilduh-- what was I thinking?? Ramin