- Talk - lists.gtalug.org

Re: [GTALUG] lazy jail server admin forced to act
by Ron / BCLUG 08 Jan '24

08 Jan '24

ac via talk wrote on 2024-01-08 02:22: > the ~ means if it is not from your servers it is also okay. > > the - means ONLY from your severs. The link I posted earlier (linuxbabe.com) had an interesting take on "~" vs "-" and why the former is preferable: If a multi-host (postfix) site receives your mail (like Google?) and it gets relayed between their servers (perhaps main one is down for maintenance), and the final server gets the mail from the backup, sees "-", it may reject it. Not sure if this is correct, but did cause pause for thought and am considering changing "-" to "~" on my domains. > Your SPF "should" maybe say: > > mimosa.com. IN TXT "v=spf1 +a +mx > +ip4:206.248.139.113 +ip4:98.158.128.23" If I recall correctly, it's best to put IP addresses earlier in the list to save DNS look-ups, saving a tiny bit of time. > (Your post did not include the "+" BEFORE the mx in the entry...) True, and I agree it's best to include them to be as specific as possible on the author's intentions, however the "+" is the default, hence implied. But, I agree, use them anyway. rb

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lazy jail server admin forced to act
by D. Hugh Redelmeier 08 Jan '24

08 Jan '24

Mails from my domain have started to be rejected by gmail. To placate gmail, I've added an SPF record to my doman: mimosa.com. IN TXT "v=spf1 mx ~all" How to read this: v=spf1: this TXT record is an SPF version 1 record mx: email sent by mimosa.com should only come from its servers declared in MX DNS records ~all: any other mail from mimosa.com is bogus. (~ and - are slightly different.) That seemed pretty painless. I guess I should have done this a decade ago. I hope this works.

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Reminder: GTALUG Monthly Meeting
by Alan Heighway 07 Jan '24

07 Jan '24

The Dark Side of Open Source <https://gtalug.org/meeting/2024-01/> 09 January, 2024 at 07:30 PM We'll start with a review of the following YouTube video: https://www.youtube.com/watch?v=Q-02fW-n4qg followed by comments and an open discussion. We're going to use Big BLue Button for this meeting: https://blue.lpi.org/b/eva-zjc-gjy-kgl *Time:* January 09th, 2024 7:30 PM Eastern Time *Join us on Big Blue Button:* https://blue.lpi.org/b/eva-zjc-gjy-kgl. LocationBig Blue Button - https://blue.lpi.org/b/eva-zjc-gjy-kgl *A*lan *H*eighway <http://heighway.ca/> heighway.ca VA3WAH / VA3YKZ [image: Please consider the environment before printing]

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meeting Tuesday?
by D. Hugh Redelmeier 07 Jan '24

07 Jan '24

We are supposed to have a meeting Tuesday but I have not seen an announcement. The venue might be changed from our Big Blue Button room. Our host, LPI, was set to switch from BBB to some NextCloud facility. If we don't get further directions, try <https://blue.lpi.org/b/eva-zjc-gjy-kgl> at 19:30 on Tuesday. There's plenty of stuff to chat about. PS: this is partly a probe of the mailing list. It went offline without notice last month. I was able to restart it when I found out about the problem.

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short window on a great deal for a mini PC
by D. Hugh Redelmeier 31 Dec '23

31 Dec '23

<https://forums.redflagdeals.com/amazon-com-beelink-ser5-mini-pc-amd-ryzen-7…> For me, it worked out to be $293.39 + tax for a Ryzen 7 5800h system with 16G RAM and 500G SSD. This is a "Lightning deal" so it will be over soon (but I can no longer see when).

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Local-only mail server
by Giles Orr 27 Dec '23

27 Dec '23

I figure this is probably a solved problem, but it's one I've never looked at. And I admit to doing no research yet: I thought pointers from this group would be the place to start. I find I have a lot of mail generated by cron and the like on several local machines, and I'd like to A) centralize that mail on a local server, and B) be able to view that with Thunderbird. Platform is Debian. It's not my intention to handle my Gmail or anything like that: this is meant exclusively for handling mail from local computers. Which would also mean the ability to send mail isn't important. Currently if I want to look at local administrative mail, I have to use the nasty `mail` command from the "bsd-mailx" package. (Yes, I could install mutt - I don't like it much better. I'm well aware it's much more powerful.) But do I remember to look at these emails? No. If instead each host forwarded these mails to a single host, and I pointed Thunderbird at that ... I'd have some hope of managing this problem better. "exim4" is usually (not always) installed on Debian systems. It claims to be an MTA: my knowledge of mail is so bad I don't even know if that means it just "pulls" or is also capable of forwarding local mail to another machine? And what would be the recommended server software? Another possible solution would be to send the mail directly to a folder on the host that has Thunderbird without using a server? With the snag that the host in question isn't always on, and I wouldn't want it to run mail server software. Is that possible? Yes, I know this is probably bigger than I think. I'd still like to start poking around and finding out about it. Suggestions welcomed, thanks. -- Giles https://www.gilesorr.com/ gilesorr(a)gmail.com

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Some questions re. UDP
by Jim Ruxton 20 Dec '23

20 Dec '23

I'm trying to understand some issues I am having using UDP . I'm sending a raw audio stream from a laptop through a dedicated router to a number of WiFi enabled ESP32 modules. The signal is going via Ethernet from the laptop to the router and then out via WiFi to the ESP32 modules. Firstly I'm wondering why I only get about half the range if I send the UDP stream via Broadcast mode vs. Multicast mode, even if I only have one ESP32 connected. Also I see some strange behaviour with a Netgear router vs. a TP Link router. With the Netgear router while sending the stream in Multicast mode I can power up the ESP32 modules one by one and it works fine. However if I disconnect one of the modules when all is running the still connected modules audio stream starts breaking up. This is fixed if I reconnect the disconnected module. This behaviour doesn't occur if I use the tP Link router. I'm assuming the fact it's breaking up using the Netgear router is because the router is looking for the disconnected module? Would there be a setting on the router to stop this behaviour? Wondering if anyone can recommend a book or resource other than madly Googling to help me understand what's going on under the hood in these cases. I haven't tried but maybe Wireshark could shed some light on this, though not sure what I should be looking for. Thanks for any advice. Jim

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Re: [GTALUG] AI Alliance
by Alvin Starr 19 Dec '23

19 Dec '23

On 2023-12-18 09:41, ac via talk wrote: > On Wed, 13 Dec 2023 00:33:24 -0800 > Ron / BCLUG via talk<talk(a)gtalug.org> wrote: > <snip> >> So, interesting times where only 54 weeks ago, OpenAI devs shocked >> the world with the release of ChatGPT 3.x, and now devs in the field >> are being shocked by open sourced (Apache licensed) AIs. > the time between the world being shocked is becoming shorter > as the singularity approaches :) I am waiting for the arrival of Singularia https://scottaaronson.blog/?p=7266 I am more worried that some idiot human will ask an AI for the DNA to a virus that will kill all Christians or Jews or Muslims, and get a virus that kills all humans. > open source models are very cool and deserve broad support. Also > interesting is hardware growth, the h100 with almost 15k cuda cores > (more than twice that of a100) and then AMD with open source ROCm > as machine learning becomes more mainstream, more hardware, faster > hardware and close vs open in that arena is also something interesting > to watch. What actually is or will be 'ai' is also interesting to watch :) It is crazy the amount of new stuff showing up every day now. It is clear that hugingface is the place to watch. -- Alvin Starr || land: (647)478-6285 Netvel Inc. || Cell: (416)806-0133 alvin(a)netvel.net ||

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AI Alliance
by Warren McPherson 18 Dec '23

18 Dec '23

Should we try to join the AI Alliance? https://newsroom.ibm.com/AI-Alliance-Launches-as-an-International-Community…

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Debian 12 takes too long to boot and login
by Kevin Cozens 17 Dec '23

17 Dec '23

Greetings, all. I have been a contributor to an Open Source project over a number of years. A lot of the devs seems to use Debian testing which means I often find I have to deal with (often minor, fortunately) dependency hell to be able to recompile the program when I haven't done so in a while. I was trying out a Debian based version of Armbian and was impressed by how easy it was to get it up and running. I've been thinking of switching to Debian from Linux Mint. I decided to have another look at the Debian 12 install I have on one of the root partitions I have for other OSs. I was *not* impressed. It took about 7 minutes to from boot to login page. It takes so long that the system that provides the splash screen during boot gave up and it changed to a black screen during the last part of the boot process. After I enter my name and password it took about another 7 minutes to get to the desktop. Under Linux mint boot to desktop takes about 3 minutes. Any clues as to why Debian takes 4 to 5 times as long? I'm hoping there is some bad configuration out of the box causing Debian 12 to be acting so slow. Anyone have any ideas where I should start looking? If I can't get to the bottom of the problem I will be staying with Linux Mint. Perhaps LMDE might be worth a try instead of pure Debian. -- Cheers! Kevin. https://www.patreon.com/KevinCozens | "Nerds make the shiny things that | distract the mouth-breathers, and Owner of Elecraft K2 #2172 | that's why we're powerful" #include <disclaimer/favourite> | --Chris Hardwick

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