April 2002 - WLUG - wlug.mailman3.com

Redundant Mail....

by wlug＠beakerware.net

I couldn't think of a better way of phrasing it. I'm running Courier for incoming SMTP, POP3, IMAP, and webmail. The mail itself is stored using Maildirs in user's home directory. Short of running something like rsync between my primary box and backup, is their any good way of getting redundancy into the picture here? I already have the backup box setup as a relay in case the primary goes down, but that doesn't make the mail any closer to the user.... -mike

April 6, 2002

Re: [Wlug] RBL access

by Chuck Homic

On Fri, Apr 05, 2002 at 04:01:21PM -0500, Josh Huber wrote: > > Anyway, is anyone using (or know of) a freely-queriable RBL? > > Although it's fun to upgrade the keyword filter, it would be easier > > if I only had to do it for exceptions. > > Hmm, dunno about a RBL, but TMDA is really cool...perhaps you should > check it out? > > http://tmda.sf.net/ TMDA looks interesting, but despite all the propaganda for whitelist-only, I really don't want to risk losing a contact because someone didn't understand, or bother to reply to the autogenerated response. As it is now, my junk is routed to a junk spool that I check on a somewhat-weekly basis, just to make sure I didn't accidentally junk a message from a potential customer, or other business contact that's just lame enough to send a spam-looking message from his Yahoo account. (Yeah, it happens!!) Spamassassin looks cool, but I don't admin the machine where my mail is processed, so it may be a while before I can set that up. ;) (It's actually a Redhat 5.1 system that hasn't been touched since Redhat 5.1 was brand new. We've only installed security upgrades.) But I did find mention of ordb.org on the spamassassin web site, which has solved my immediate problem. ;) > > BTW, for the curious, my daily haul of junk mail varies from 20 to > > 40 messages. Can anyone beat that? > > Hmm, that's about what I get. Lately I've been getting a lot of > chinese spam with unreadable subject/body, which is interesting. Korean, for me. Odd. -Chuck

April 5, 2002

Re: [Wlug] Problems dropping telnet sessions

by doug waud

Hi all Josh Huber wrote: > > "Charles R. Anderson" <cra(a)WPI.EDU> writes: > > > Try ipchains -L too, since you might have an ipchains based firewall. > > I doubt it, since he's running 2.4.10... > > Of course, it's possible, but I doubt SuSE would ship a firewall setup > with 2.4.x, and use the compatibility module for ipchains... I have SuSE 7.2 and I get a response to ipchains -L but not to iptables -L :-) (uname -r gives 2.4.4-4GB) SuSE supplies two firewalls, a personal one (a quickie, basically just masquerading) and "SuSE firewall". The latter is configured via a file /etc/rc.config.d/firewall.rc.config which has this line Note: For 2.4 kernels, you need to have ipchains support enabled. in the comments section. So Chuck's instincts seem well-based. In SuSE's defense, this is back at 2.4.4 kernel which, I gather, was not quite ready for prime time even with the ipchains modules. Also SuSe does not claim to hand-hold for firewall stuff; you have to pay extra for that >-) doug PS My spell-checker thinks "firewall" might be "fireball" :-)

April 5, 2002

Re: [Wlug] RBL access

by Josh Huber

Chuck Homic <chuck(a)vvisions.com> writes: > Anyway, is anyone using (or know of) a freely-queriable RBL? > Although it's fun to upgrade the keyword filter, it would be easier > if I only had to do it for exceptions. Hmm, dunno about a RBL, but TMDA is really cool...perhaps you should check it out? http://tmda.sf.net/ > BTW, for the curious, my daily haul of junk mail varies from 20 to > 40 messages. Can anyone beat that? Hmm, that's about what I get. Lately I've been getting a lot of chinese spam with unreadable subject/body, which is interesting. ttyl, -- Josh Huber

April 5, 2002

Re: [Wlug] Problems dropping telnet sessions

by Josh Huber

"Charles R. Anderson" <cra(a)WPI.EDU> writes: > Try ipchains -L too, since you might have an ipchains based firewall. I doubt it, since he's running 2.4.10... Of course, it's possible, but I doubt SuSE would ship a firewall setup with 2.4.x, and use the compatibility module for ipchains... > Maybe the TCP timers are different on Linux? They are in > /proc/sys/net/ipv4/tcp*. Perhaps... I would think the firewall would only timeout connections which are being masq'd and run through connection tracking...and in that case, I thought the default timeout was pretty high. try iptables -t nat -L to see what's going on there. -- Josh Huber

April 5, 2002

RE: [Wlug] next meeting

by Keller, Tim

Yup, actually I'm doing a presentation on writing a system call for the linux kernel. Speaking of which, I need to get back to working on my presentation... Tim. -----Original Message----- From: Scott Venier [mailto:scott@scooter.cx] Sent: Friday, April 05, 2002 10:23 AM To: 'wlug(a)mail.wlug.org' Subject: RE: [Wlug] next meeting Any chance we have a topic yet? Scott On Fri, 5 Apr 2002, Keller, Tim wrote: > Yup, at last check the 11th is still on! > > Tim. > > -----Original Message----- > From: Goblaskas, Dana [mailto:goblaskasd@grafton.k12.ma.us] > Sent: Friday, April 05, 2002 8:18 AM > To: wlug(a)mail.wlug.org > Subject: [Wlug] next meeting > > > Hello, > > I just wanted to check if the meeting for April 11th is > still on. I have a few students in a computer science > independent study who are interested in attending. If the > meeting is still going to take place 4/11 at 7:00pm, please > e-mail me back and let me know. > > Thank you! > > Dana > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

April 5, 2002

RE: [Wlug] next meeting

by Scott Venier

Any chance we have a topic yet? Scott On Fri, 5 Apr 2002, Keller, Tim wrote: > Yup, at last check the 11th is still on! > > Tim. > > -----Original Message----- > From: Goblaskas, Dana [mailto:goblaskasd@grafton.k12.ma.us] > Sent: Friday, April 05, 2002 8:18 AM > To: wlug(a)mail.wlug.org > Subject: [Wlug] next meeting > > > Hello, > > I just wanted to check if the meeting for April 11th is > still on. I have a few students in a computer science > independent study who are interested in attending. If the > meeting is still going to take place 4/11 at 7:00pm, please > e-mail me back and let me know. > > Thank you! > > Dana > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

April 5, 2002

RE: [Wlug] next meeting

by Keller, Tim

Yup, at last check the 11th is still on! Tim. -----Original Message----- From: Goblaskas, Dana [mailto:goblaskasd@grafton.k12.ma.us] Sent: Friday, April 05, 2002 8:18 AM To: wlug(a)mail.wlug.org Subject: [Wlug] next meeting Hello, I just wanted to check if the meeting for April 11th is still on. I have a few students in a computer science independent study who are interested in attending. If the meeting is still going to take place 4/11 at 7:00pm, please e-mail me back and let me know. Thank you! Dana _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

April 5, 2002

next meeting

by Goblaskas, Dana

Hello, I just wanted to check if the meeting for April 11th is still on. I have a few students in a computer science independent study who are interested in attending. If the meeting is still going to take place 4/11 at 7:00pm, please e-mail me back and let me know. Thank you! Dana

April 5, 2002

RE: [Wlug] CPU & Bad NFS Question

by Marc Hughes

Also, forgot to mention it ... any ideas on how to make this not happen in the first place? -Marc -----Original Message----- From: Marc Hughes Sent: Thursday, April 04, 2002 3:11 PM To: wlug(a)wlug.org Subject: [Wlug] CPU & Bad NFS Question So yesterday I had an nfs mount go bad (thought it would be a great idea to just use nfs for a few minutes to do some file comparisons across machines) .. And since then the CPU utilizaion on the machine has been pegged out. The machine still is very responsive. When the mount went bad ... I couldn't do anything with any process that was using anything on that volume. I tried a bunch of stuff, but eventually just shut down NFS (so the processes got an I/O error and died) and did an "umount -f" on that volume. Any ideas on how to make this better? -Marc CPU0 states: 14.0% user, 85.0% system, 0.0% nice, 0.0% idle CPU1 states: 50.0% user, 50.0% system, 0.0% nice, 0.0% idle Mem: 1048088K av, 1023836K used, 24252K free, 0K shrd, 45404K buff Swap: 1052248K av, 148K used, 1052100K free 763964K cached PID USER PRI NI SIZE RSS SHARE LC STAT %CPU %MEM TIME COMMAND 20099 hughesm 16 0 940 940 696 3 R 2.6 0.0 0:00 top 20074 root 2 0 1716 1704 1188 2 S 0.3 0.1 0:00 sshd 1 root 0 0 484 484 408 3 S 0.0 0.0 2:31 init 2 root 0 0 0 0 0 2 SW 0.0 0.0 0:18 kflushd 3 root 0 0 0 0 0 2 SW 0.0 0.0 9:22 kupdate 4 root 0 0 0 0 0 2 SW 0.0 0.0 9:00 kswapd _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

April 4, 2002