Roundtable

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2555 discussions

RF networks
by Dan & Michele 13 May '05

13 May '05

At the meeting on Tuesday, there was a discussion from an individual (of course I can't remember his name and I was 2 seats away) about the troubles he was having with his RF-based internet provider. I can't recall which provider he was using ... if you're here, drop me a line .. or if anyone else recalls what rf provider was mentioned, let me know too.. thanks. Dan.

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Intrusion detection
by John Lange 12 May '05

12 May '05

What tools are available to automatically firewall a given IP address if it fails to login via SSH a given number of times or any other activity which seems suspicious? Google didn't seem to turn up much on this topic. -- John Lange President OpenIT ltd. www.Open-IT.ca (204) 885 0872 VoIP, Web services, Linux Consulting, Server Co-Location

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WRT54G Wireless Router firmware
by Bill Reid 12 May '05

12 May '05

Here is a company that is trying to make money at producing the firmware: http://www.sveasoft.com/ The group who first started modding the firmware and encourages community wireless nodes: http://www.seattlewireless.net/

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Remote X on Fedora Core 3 via SSH
by John Lange 12 May '05

12 May '05

Further to the question about remote X on Fedora. I was able to get my remote X working via an SSH tunnel simply by logging in with ssh as follows: ssh -X <userid>@fedoramachine.com Once logged in you can invoke any X command and it just works. The -X option sets up everything for you automatically and note that "X11Forwarding yes" is still the FC3 default in /etc/ssh/sshd_config. Perhaps everyone but me knew about this already? -- John Lange President OpenIT ltd. www.Open-IT.ca (204) 885 0872 VoIP, Web services, Linux Consulting, Server Co-Location

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Enabling Linux failover routing
by John Lange 11 May '05

11 May '05

Ok, here is how to enable failover routing in Linux in 3 lines. http://enterprise.linux.com/enterprise/05/04/10/2132252.shtml?tid=129&tid=1… ----------- Enabling failover routing After you have configured your network, the next step is to enable failover routing on your Linux box, so that if the first route dies the router will automatically switch over to the next route. To do so, you'll need to add the default gateway routes provided to you by your ISPs for both your network cards: # route add default gw 61.16.130.97 dev eth0 # route add default gw 200.15.110.90 dev eth1 Finally, modify the /proc/sys/net/ipv4/route/gc_timeout file. This file contains a numerical value that denotes the time in seconds after which the kernel declares a route to be inactive and automatically switches to the other route if available. Change its default value of 300 to some smaller value, say 10 or 15. Save the changes and exit. # echo "10" > /proc/sys/net/ipv4/route/gc_timeout Now your Linux machine is ready to serve as a failover router, automatically and quickly switching to the secondary route every time the primary route fails. -------- -- John Lange President OpenIT ltd. www.Open-IT.ca (204) 885 0872 VoIP, Web services, Linux Consulting, Server Co-Location

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NetBSD on a Mac 8500
by Mike Pfaiffer 11 May '05

11 May '05

Good presentation by Kevin last night BTW. Now for the question. I want to set up NetBSD on a Mac 8500 (PPC 603) with accelerator card. I have two, two gigabyte harddrives. Some large amount of RAM above what is required. I want to put NetBSD on the machine just to say I have done it and to have it act as a low volume server (mostly so I can experiment with the differences between BSD and Linux). The instructions I found on the NetBSD page explain how to make a dual boot system. I'm not interested in dual booting. I want this machine to boot only into NetBSD. Before the meeting last night we were discussing how to install NetBSD on this machine without the dual boot option. I thought it might be useful to ask how this can be done simply. If this works, I may be able to pass along this knowledge to three other people who are considering this for their older Macs. Best start from step one. I haven't downloaded it yet. Later Mike -- +----------------------------------------------------------------------+ |Call-A.P.P.L.E. and the Digital Civilization http://www.callapple.org | | http://members.shaw.ca/pfaiffer = Mike Pfaiffer (B.A., B.Sc.) | +----------------------------------------------------------------------+ ----- BEGIN GEEK CODE BLOCK ----- Version: 3.12 GCS/G/IT/PA/SS d s+:- a? C++ UL L++ W++ N++ o+ K- w(---) O+@ M++@ V PS+ PE !PGP t+ 5+ X R tv b+ DI+++ D++ G e++* h! r-- !y-- UF++ ------ END GEEK CODE BLOCK ------

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Raid benchmarks. Hardware vs. Software
by John Lange 10 May '05

10 May '05

I recently built a server with a hardware 3Ware 9500 RAID card. This is the SATA version and it has 4 180G drives attached to it. Once the machine was built I wanted to bench the RAID array just to make sure everything was working and I thought I'd share the results here just for interest. For comparison I have results from a 4 drive SATA SOFTWARE RAID set and my workstation. Using bonnie++ v1.3a for benching. Hardware RAID ------------- Machine is a P4 3.2Ghz.with 2G of ram. (4 Disk SATA Hardware RAID 5) Sequential Blocks Out: 53,282 K/sec Sequential Blocks In: 146,837 K/sec Software RAID ------------- Machine is a P4 2.8Ghz.with 1G of ram. (4 Disk SATA Software RAID 5) Sequential Blocks Out: 64,924 K/sec Sequential Blocks In: 80,435 K/sec Workstation (NON RAID ATA Drive) -------------------------------- Machine is a Athalon 1.8Ghz.with 512K of ram. Sequential Blocks Out: 22,081 K/sec Sequential Blocks In: 27,434 K/sec Noteworthy: During block reads and writes, neither the software or hardware raid caused any significant CPU load (less than 10% in all cases). -- John Lange President OpenIT ltd. www.Open-IT.ca (204) 885 0872 VoIP, Web services, Linux Consulting, Server Co-Location

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MUUG Meeting, May 10, 7:30pm -- The Xen Hypervisor
by gedetil＠cs.umanitoba.ca 03 May '05

03 May '05

[Posted to man.unix.general and other news groups] ------ Forwarded Article <d585va$gb7$1(a)canopus.cc.umanitoba.ca> ------ From gedetil(a)cs.umanitoba.ca (Gilbert E. Detillieux) The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting on Tuesday, May 10. The meeting topic for this month is as follows: The Xen Hypervisor You may have heard about Virtual Machine Managers (VMMs) such as VMware or Microsoft's Virtual PC, and now Xen. What are they? How do they work? How do they differ from each other? And more importantly, what can they do for you? Kevin McGregor will be shedding light on these topics at the May 10th meeting. The group holds its general meetings at 7:30pm on the second Tuesday of every month from September to June. (There are no meetings in July and August.) Meetings are open to the general public; you don't have to be a MUUG member to attend. ********************************************************************** Please note our meeting location: The IBM offices, at 400 Ellice Ave. (between Edmonton and Kennedy). When you arrive, you will have to sign in at the reception desk, and then wait for someone to take you (in groups) to the meeting room. Please try to arrive by about 7:15pm, so the meeting can start promptly at 7:30pm. Don't be late, or you may not get in. (But don't come too early either, since security may not be there to let you in before 7:15 or so.) Limited parking is available for free on the street, or in a lot across Ellice from IBM, for $1.00 for the evening. Indoor parking is also available nearby, at Portage Place, for $2.00 for the evening. ********************************************************************** For more information about MUUG, and its monthly meetings, check out their Web server: http://www.muug.mb.ca/ Also note that MUUG maintains two mailing lists, called "muug-announce" and "roundtable". If you're not already on these lists, we encourage you to subscribe now: http://www.muug.mb.ca/mailman/listinfo/ The "muug-announce" list is used for monthly meeting announcements (such as this one) as well as other important announcements of interest to MUUG members. The "rountable" list is meant to be a forum for follow-ups to topics discussed at the meetings, or for round-table-style discussion on other topics that come up between meetings. Of course, for this to be effective, we need to reach a certain critical mass. So, please subscribe, and stay involved! -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.mb.ca> Manitoba UNIX User Group Web: http://www.muug.mb.ca/ P.O. Box 130, St-Boniface Phone: (204)474-8161 Winnipeg, MB, CANADA R2H 3B4 Fax: (204)474-7609 ------ End of Forwarded Article

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Envelope Printing under Linux
by John Lange 03 May '05

03 May '05

One of the things that still manages to frustrate me on a regular basis is printing under Linux. I have notice some dramatic improvements recently, especially with HP now releasing their own Linux drivers for all of their printers and KDE & CUPS focusing on bringing it all together. But I still run into problems from time to time. Today, I think I have run the same envelope through by 2 HP printers at least 40 times to no avail. I simply can not get an envelope to print. Printers I've tried are: HP Photosmart 7760 HP Deskjet 830C Tried printing from OpenOffice 1.1.4 and kGhostscript. In OpenOffice I did "Insert >> Envelope" and entered the information and it makes a nice envelope on screen. Great, now if I could only mail my monitor everything would be wonderful. On the other hand, when I print it the printer stops saying "Paper too small". If I put in a sheet of 8.5x11 it prints it fine and in the proper orientation. I have tried every conceivable combination of settings in OO and the printer settings themselves. Paper is set to DL, landscape/portrait everything I could think of but it always does the same thing. Finally I tried exporting it to a PDF and printing that but got the exact same results. No matter what I do it will not print the envelope. It seems the printers are expecting the paper to be full size which leads me to believe the settings are not being passed from the software to the printer... If there is some magic to this please let me know. P.S. I used to have an HP Laser 4MP which has Postscript built in and it was the only thing that I ever got to print an envelope under Linux. Regards, -- John Lange President OpenIT ltd. www.Open-IT.ca (204) 885 0872 VoIP, Web services, Linux Consulting, Server Co-Location

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Re: [RndTbl] tripod slider images?
by gedetil＠cs.umanitoba.ca 19 Apr '05

19 Apr '05

According to Ian: > Hi all. > Really enjoyed your presentation on 3D images Gilbert! What good fun > that looks to be. Thanks! Glad you enjoyed it and are interested in trying this out... > If anyone owns one a tripod slider and wouldn't mind posting some > detailed pictures, I'd love to have a closer look at one. A Google search on the 3 words "tripod slide bar" will give you a lot of results... http://www.google.com/search?q=tripod+slide+bar Some of the pages (and photos) are of commercial products, and some are for "homebrew" contraptions. So, you have plenty of options, either way. -- Gilbert E. Detillieux E-mail: <gedetil(a)cs.umanitoba.ca> Dept. of Computer Science Web: http://www.cs.umanitoba.ca/~gedetil/ University of Manitoba Phone: (204)474-8161 Winnipeg, MB, CANADA R3T 2N2 Fax: (204)474-7609

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