This is part of The Pile, a partial archive of some open source mailing lists and newsgroups.
Subject: Re: Network Exerciser? From: Rob Tanner <rtanner@cheshire.onlinemac.com> Date: Wed, 20 Sep 2000 09:49:16 -0700 --On 09/20/00 11:11:09 AM -0400 "Barry L. Kline" <blkline@attglobal.net> wrote: > Does anyone know of a Linux-based piece of software for testing a > TCP/IP network? I have a segment of my network that's in another > building which is connected by glass. Machines over there are getting > exquisitely slow response times and my supposition is that TCP/IP > retries are occuring due to some flakey equipment. Ping works fine to > anything over there, yet any transmissions of sizeable data take > forever. I have two transceivers and two hubs that could be the > problem and I don't have spares (currently.) > > I have hardware-based testing equipment for testing 10-BaseT but > nothing that will cross the different media types. > > If there is a piece of software that would load up a network and give > me some idea of the current stats I could start isolating each piece, > using my laptop and another computer. A google search hasn't turned > up anything yet I'm sure that one must exist already. What you're describing would suggest a problem with late collisions which fits your supposition of flaky hardware since that's the exclusive cause of late collisons. The typical term for packets where late collisons have occurred is, I think, stub packets or snub or something like that. Basically, they are short packets. Any good sniffer should be able to discover them and report them, and suggest you look at ethereal -- it may or may not. The URL is: http://ethereal.zing.org. If I understand your network scenario correctly, the two pieces of your network are connected by hubs, so any late collisions will be detectable anyplace on the network, including your desk, and you can run a sniffer right from there. If you have bridging or switching (or a router) anywhere in between, than that splits the collision domains, and the only thing you'll notice from your desk is slowness. One other thing, if you're using switches and presuming they're not $1.98 K-Mart specials, thety are probably collecting bunches of useful performance statistics, including counts of late collisions. Reset the counters so you have base and then just watch them. === Subject: Re: Network Exerciser? From: John Aldrich <john@chattanooga.net> Date: Wed, 20 Sep 2000 13:43:49 -0400 On Wed, 20 Sep 2000, Barry L. Kline wrote: > Does anyone know of a Linux-based piece of software for testing a > TCP/IP network? I have a segment of my network that's in another > building which is connected by glass. Machines over there are getting > exquisitely slow response times and my supposition is that TCP/IP > retries are occuring due to some flakey equipment. Ping works fine to > anything over there, yet any transmissions of sizeable data take > forever. I have two transceivers and two hubs that could be the > problem and I don't have spares (currently.) > Try MTR -- Matt's TraceRoute. It's a combination ping and traceroute. It should show where the slowdown is occurring. John === Subject: Re: Network Exerciser? From: John Aldrich <john@chattanooga.net> Date: Wed, 20 Sep 2000 13:44:41 -0400 BTW, for the current version of MTR go to: http://www.bitwizard.nl/mtr/ === Subject: Re: [RHL] Apache Settings [more] From: Kirk <kirk@death.prince-of-darkness.cc> Date: Wed, 20 Sep 2000 10:40:13 -0700 >At 12:21 PM 9/20/00 -0500, you wrote: >Finally I'm being asked for a password, but I'm getting "Authorization failed, retry?" errors. > >Any ideas why? I'm using htpasswd, read several examples and the man page, it's so simple it's hard to mess up. Permissions and directives are as follows: > >[root@csc003 RedHatUpdates]# ls -l /etc/httpd/conf/httpd.conf >-rw-r--r-- 1 root root 34087 Sep 20 12:05 /etc/httpd/conf/httpd.conf > ><VirtualHost *IP_addresss_here*> > ServerAdmin wilson@claborn.net > DocumentRoot /Webhomes/Vanguard_mailer > ErrorLog logs/VanguardMailer-error_log > CustomLog logs/VanguardMailer-access_log common > <Directory /Webhomes/Vanguard_mailer> > AllowOverride AuthConfig > </Directory> ></VirtualHost> > >[root@csc003 RedHatUpdates]# ls -l /Webhomes/Vanguard_mailer/.htaccess >-rw-r--r-- 1 admin users 128 Sep 20 11:33 /Webhomes/Vanguard_mailer/.htaccess > >[root@csc003 RedHatUpdates]# cat /Webhomes/Vanguard_mailer/.htaccess >AuthType Basic >AuthName "By Invitation Only" >AuthUserFile /work/htpasswd.vanguard >AuthGroupFile /dev/null >require user *username_here* > > >[root@csc003 RedHatUpdates]# ls -l /work/htpasswd.vanguard >-rw-r--r-- 1 admin users 23 Sep 20 12:08 /work/htpasswd.vanguard > >(which contains the username and some encrypted version of the password) > >Do any of those look wrong? Why else would Authorization fail? (note: it's not because I'm typing the wrong password ;-) If I recall correctly the AuthUserFile line needs to point with the absolute path to the htpasswd file ex: /home/webuser/public_html/directory/.htpasswd AuthUserFile /absolute/path/to/.htpasswd AuthGroupFile /dev/null AuthName "Registered Users Only" AuthType Basic <Limit GET> require valid-user </Limit> ===