April 2024 - Roundtable

MUUG Meeting, Tuesday, May 7, 7:30pm (In-person/Hybrid Meeting) -- DMARC/SPF/DKIM
by Gilbert Detillieux 30 Apr '24

30 Apr '24

The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting IN PERSON, on Tuesday, April 2nd, at 7:30pm. Yes, that's the FIRST Tuesday of the month... DMARC/SPF/DKIM (with one-click unsubscribe and alignment) Do you have anything at all to do with email daemons, managing email hosted by a third party provider, or manage DNS? Google just made your life a lot more complicated. (And heaven help you if you have anything to do with "mass" email sending.) Come on down to MUUG this month and Trevor Cordes will talk about all the technologies you must now implement to stay borg-compliant and ensure your emails don't get dumped into the Spam box or worse! We're talking DMARC, DKIM, SPF... And what's with this new "alignment" thing? If there's time we'll even go into one-click unsubscribe! Where to find the Meeting: Fortress Software Inc., 350 Keewatin St -- Unit #2 We have a new in-person meeting location now! Brad Vokey has graciously let us use his work office for our next in-person meeting. The meeting room will be open by 7:00 pm, with the actual meeting starting at 7:30 pm. If driving, enter the lot using the most north east entrance and drive around to the south west corner of the building (see route in map detail on poster linked below). You can use any of the free, ample, and safe parking spots that say "reserved" in front of units #1 through #4 before entering unit #2. Bus stops #30814 and #30880 (route 77) are only 150 meters away. The last bus leaves for Polo Park at 10:15 pm and for Garden City at 10:31 pm. Logan Ave. bus routes #19, #26, and #27 are a 600 meter (8 minute) walk to the south. For those unable or preferring not to attend in person, the meeting will also be available online, using BBB as usual. Stay tuned to our muug.ca home page for the official URL, which will be made available about a half hour before the meeting starts. (Reload the page if you don't see the link, or if there are issues with connecting.) The group now holds its meetings at 7:30pm on the *first* 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. For more information about MUUG, and its monthly meetings, check out their web server: https://muug.ca/ Help us promote this month's meeting, by putting this poster up on your workplace bulletin board or other suitable public message board, or linking to it on social media: https://muug.ca/meetings/MUUGmeeting.pdf -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.ca> Manitoba UNIX User Group Web: http://muug.ca/

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php head-exploding moment
by Trevor Cordes 26 Apr '24

26 Apr '24

cat z.php <? $a=[0=>'2', 1=>'3']; foreach ($a as $k=>&$v) { $v++; echo "$k,$v\n"; } #unset($v); echo "\n"; foreach ($a as $k=>$v) { echo "$k,$v\n"; } echo "\n"; ?> Ok, guess what this prints out? 0,3 1,4 0,3 1,4 Right? Wrong: 0,3 1,4 0,3 1,3 Until I stumble on this, see the Warning on second page. https://www.php.net/manual/en/control-structures.foreach.php This has got to be the most messed up fail by a language ever because in no circumstances would any sane programmer ever expect this from any language and in no way would any programmer ever want this behavior nor could it ever be useful ever. Perl (an early (first?) adopter of the "foreach") doesn't do this. Surely php can "fix" this somehow. The recommended "fix" is to uncomment the "unset" in the code to unlink the reference.

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TPUG: Toronto PET Users Group (yes, really)
by Gilbert Detillieux 21 Apr '24

21 Apr '24

This was just brought to my attention, after someone in our department posted it in a group chat. There's an active PET user group in Toronto, that has monthly meetings, sometimes online/virtual (on Zoom), and sometimes featuring some of the big names from the Commodore computer era(s), not just PET, but C64, C128, Amiga, etc. https://www.tpug.ca/ And if you thought MUUG's website had a retro look, check out their title font! Gilbert

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weird web hit 80 & 443?
by Trevor Cordes 19 Apr '24

19 Apr '24

5.6.7.8 - - [17/Apr/2024:00:17:59 -0500] "GET / HTTP/1.0" 400 362 "-" "-" sampledomainfoobar.com 1.2.3.4 80 443 HTTP/1.0 - - 56 Apache 2.4. LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %v %A %p %{local}p %H %f %L %D" teccombinedwithpath How can I get a hit where %p is 80 and %{local}p is 443? https://httpd.apache.org/docs/2.4/mod/mod_log_config.html#formats %p The canonical port of the server serving the request. %{format}p The canonical port of the server serving the request, or the server's actual port, or the client's actual port. Valid formats are canonical, local, or remote. One vhost is listening on 80, the other 443. Pretty standard setup. 80 does a redir to 443. HTTP2 is present, but the hit shows HTTP1. And apache gets confused and throws a 400. Looking at the very few hits like this it seems like some sort of probe: other probes occurring at the same time. Just wondering that they are doing to achieve this hit.

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tor exit node count?
by Trevor Cordes 04 Apr '24

04 Apr '24

Anyone know how many tor exit nodes there are out there?

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Reminder: MUUG Meeting, Tonight, Apr 2, 7:30pm (In-person/Hybrid Meeting) -- AllStarLink
by Gilbert Detillieux 02 Apr '24

02 Apr '24

A reminder that the MUUG meeting will be this evening, both in person and online... The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting IN PERSON, on Tuesday, April 2nd, at 7:30pm. Yes, that's the FIRST Tuesday of the month... AllStarLink - Ham Radio over IP AllStarLink is a Radio over IP (RoIP) application based on the popular Asterisk VoIP solution. AllStarLink is designed to connect licensed ham radio transceivers using VoIP protocols to allow extended coverage areas by connecting multiple transceivers at different locations together. Wyatt Zacharias will present on the history of amateur radio repeaters in Manitoba, and how they are being modernized with AllStarLink to use IP networks as the backbone for a connected system. Where to find the Meeting: Fortress Software Inc., 350 Keewatin St -- Unit #2 We have a new in-person meeting location now! Brad Vokey has graciously let us use his work office for our next in-person meeting. The meeting room will be open by 7:00 pm, with the actual meeting starting at 7:30 pm. If driving, enter the lot using the most north east entrance and drive around to the south west corner of the building (see route in map detail on poster linked below). You can use any of the free, ample, and safe parking spots that say "reserved" in front of units #1 through #4 before entering unit #2. Bus stops #30814 and #30880 (route 77) are only 150 meters away. The last bus leaves for Polo Park at 10:15 pm and for Garden City at 10:31 pm. Logan Ave. bus routes #19, #26, and #27 are a 600 meter (8 minute) walk to the south. For those unable or preferring not to attend in person, the meeting will also be available online, using BBB as usual. Stay tuned to our muug.ca home page for the official URL, which will be made available about a half hour before the meeting starts. (Reload the page if you don't see the link, or if there are issues with connecting.) The group now holds its meetings at 7:30pm on the *first* 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. For more information about MUUG, and its monthly meetings, check out their web server: https://muug.ca/ Help us promote this month's meeting, by putting this poster up on your workplace bulletin board or other suitable public message board, or linking to it on social media: https://muug.ca/meetings/MUUGmeeting.pdf -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.ca> Manitoba UNIX User Group Web: http://muug.ca/

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Printing from Windows to WSL back to Windows USB...
by Adam Thompson 02 Apr '24

02 Apr '24

I know some of you are still hanging on to old printers that Win10/Win11 don’t support anymore, here’s how you can work around that IF they’re still supported under Linux: Reviving an older printer with Ubuntu WSL and Printer Application Snaps - OpenPrinting<https://openprinting.github.io/wsl-printer-app/> If you’re devoted enough to a printer, this might be useful… but man, that better be one heck of a nice printer. -Adam

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