April 2013 - Roundtable

SpamAssassin false positives on DATE_IN_FUTURE_96_Q?
by Gilbert E. Detillieux 23 Feb '16

23 Feb '16

I mentioned this problem at the last round-table session, but didn't get a solution, so I thought I'd post it here, just in case anyone has any suggestions to offer. I'm still seeing a whole bunch of false positives in SpamAssassin, since an update was installed in mid-September on a CentOS 5.7 system, for a rule called DATE_IN_FUTURE_96_Q, which is only supposed to be triggered when the "Date:" header has a date that is 4 days to 4 month ahead of the date in the "Received" header that has the _smallest_ difference in date. Here are the headers from the latest e-mail I've received with this false-positive. (I've stripped out irrelevant headers, for the sake of clarity and simplicity.) From topfivestories(a)messagent.itworldcanada.com Mon Nov 14 07:50:13 2011 Received: from mail.messagent.itworldcanada.com (mail.messagent.itworldcanada.com [207.112.10.80]) by palladium.cs.umanitoba.ca (8.13.8/8.13.8) with SMTP id pAEDoAxV028594 for <gedetil(a)cs.umanitoba.ca>; Mon, 14 Nov 2011 07:50:12 -0600 Date: Mon, 14 Nov 2011 08:50:13 -0500 X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00,DATE_IN_FUTURE_96_Q, HTML_MESSAGE,RP_MATCHES_RCVD autolearn=no version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on palladium.cs.umanitoba.ca Note that I'm calling spamd via the spamass-milter on a system running sendmail. Note also, that in the above example, the only "Received" header was the one generated by my own server. (I've had other false positives, however, with multiple "Received" headers, all of which were within seconds of the time in the "Date" header.) Any ideas? -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.mb.ca> Manitoba UNIX User Group Web: http://www.muug.mb.ca/ PO Box 130 St-Boniface Phone: (204)474-8161 Winnipeg MB CANADA R2H 3B4 Fax: (204)474-7609

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ZFS on Linux + Swap
by Robert Keizer 26 Apr '13

26 Apr '13

In case you ever found yourself needing swap while you're running the third party ZFS module for Linux, read on. Assuming all your disks are ZFS, doing a standard "dd if=/dev/zero of=./file bs=1024k count=4096 && mkswap file && swapon file" doesn't work. Why, I don't know - and I don't really care at the moment. Solution: "loop=`losetup -f` && dd if=/dev/zero of=./file bs=1024k count=4096 && mkswap file && losetup $loop file && swapon $loop". Go figure that piping it through a loopback device works just fine. +1 for compiz taking 1.7gb of ram. +1 for 5 VirtualBox windows images at 2gb per segfaulting with 12gb of system ram. Gah.

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by Gilbert E. Detillieux 23 Apr '13

23 Apr '13

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Internet Society Canada chapter established
by Dan Keizer 16 Apr '13

16 Apr '13

Some of you may have an interest in this ... Yesterday, there was a brief web broadcast on the Internet Society with the Canada chapter being formed. http://www.internetsociety.ca/ Initial (advocacy) prime issues (from the website) include: - Net neutrality, which pertains to Internet transparency, freedom of expression and user choice - Technical standards - Accessibility to quality Internet in rural and remote areas of Canada - Internet service provider concentration - Cross-ownership of content providers by Internet carriers Certainly, relevant hot topics in recent times ... Membership in the society is free -- via this link: http://www.internetsociety.ca/join-us/ You join the group by joining the Canada Chapter. A number of supporting groups/people were present - including CIRA CEO Byron Holland. Some other topics on the webinar: Youth outreach - Providing the appropriate channel of communication with appropriate topics. Access, rural and first nations. Advocating for internet community in Ottawa and Provincially. Dan.

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Re: [RndTbl] Fwd: Security camera install course at Skullspace
by Adam Thompson 07 Apr '13

07 Apr '13

I now tend to agree, since it's almost impossible for me to reply to the sender using Android's mail client. Even if I use Reply All, the sender's email does not show up. Bill Reid <billreid(a)shaw.ca> wrote: >On a small list this is not a huge problem but on larger lists you can see why >they recommend not configuring Mailman this way. Reply should go to sender by >default. > >On 07/04/13 12:02, Adam Thompson wrote: >> Whoops. Forgot to double-check where my reply was going to, sorry about that. >> -Adam >> >_______________________________________________ >Roundtable mailing list >Roundtable(a)muug.mb.ca >http://www.muug.mb.ca/mailman/listinfo/roundtable

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Re: [RndTbl] Fwd: Security camera install course at Skullspace
by Adam Thompson 07 Apr '13

07 Apr '13

Whoops. Forgot to double-check where my reply was going to, sorry about that. -Adam Adam Thompson <athompso(a)athompso.net> wrote: >_______________________________________________ >Roundtable mailing list >Roundtable(a)muug.mb.ca >http://www.muug.mb.ca/mailman/listinfo/roundtable

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Counterfeit ATCom CAT5 (CCA) from CBIT
by Colin Stanners 07 Apr '13

07 Apr '13

I had a few 'cat5e' runs at AW that were exhibiting strange issues - PoE didn't work well, more at the device power-on where you'd expect a surge of current. Crimps seemed really sensitive. Generally communication over them 'felt' off. I bypassed them and guessed it was wire damage from the construction but as I'm taking them down they seem undamaged. I had heard of CCA 'fake cat5' before, http://www.twistedpair.co/caution-using-cooper-clad-aluminium-cat5-cable/ but never seen any. Scraped some of the wires and to my untrained eye it seems these are CCA. We can keep using them for analog cameras - didn't see any problems there yet - but nothing else. These came from 3 boxes of 'ATcom NWC-215-313' that were bought at CBIT. I'm assuming fake products like this are one of the reasons they're out of business now, but if you have any boxes sitting around you may want to toss them.

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Re: [RndTbl] Fwd: Security camera install course at Skullspace
by Adam Thompson 07 Apr '13

07 Apr '13

I'm not sure if you wanted RSVPs, but I plan to be there. -Adam Colin Stanners <cstanners(a)gmail.com> wrote: >_______________________________________________ >Roundtable mailing list >Roundtable(a)muug.mb.ca >http://www.muug.mb.ca/mailman/listinfo/roundtable

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Fwd: Security camera install course at Skullspace
by Colin Stanners 07 Apr '13

07 Apr '13

I'm not sure anyone in your groups would be interested, but just in case: ---------- Forwarded message ---------- From: Colin Stanners <cstanners(a)gmail.com> Date: Sun, Mar 31, 2013 at 9:40 PM Subject: Security camera install course at Skullspace To: announce(a)lists.skullspace.ca, "discuss(a)lists.skullspace.ca" < discuss(a)lists.skullspace.ca> As there's a bit of interest, I'll be doing a class this Wednesday (April 10th) at 7pm on installing security cameras and related systems. Everyone who comes gets a free b&w camera as long as I have stock. -General overview: analog and digital systems -settings on cameras -capture cards and software on PCs -mounting, wire running

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MUUG Meeting, Apr 9, 7:30pm -- Red Hat Enterprise Virtualization
by gedetil＠cs.umanitoba.ca 02 Apr '13

02 Apr '13

The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting on Tuesday, April 9. The meeting topic for this month is as follows: Red Hat Enterprise Virtualization Red Hat Enterprise Virtualization, based on the open-source oVirt platform, competes with VMware vSphere and Hyper-V's Operations Manager. The University of Winnipeg Library is implementing a small RHEV system, and Adam Thompson will introduce and demonstrate the software and discuss some of the challenges encountered as compared to using VMware vSphere. 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 *NEW* meeting location: Room 1L08, Lockhart Hall, University of Winnipeg, entrance on Ellice Ave. between Spence St. and Balmoral St. Parking is available on the surrounding streets and in the lots on nearby streets. Look for signage once you're at the building, or ask a security guard. ****************************************************************** For more information about MUUG, and its monthly meetings, check out their Web server: http://www.muug.mb.ca/ Help us promote this month's meeting, by putting this poster up on your workplace bulletin board or other suitable public message board: http://www.muug.mb.ca/meetings/MUUGmeeting.pdf -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.mb.ca> Manitoba UNIX User Group Web: http://www.muug.mb.ca/ PO Box 130 St-Boniface Phone: (204)474-8161 Winnipeg MB CANADA R2H 3B4 Fax: (204)474-7609

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