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IPv6 only WiFi hotspot
by Val Kulkov 27 Sep '19

27 Sep '19

I found myself connected to an IPv6-only WiFi hotspot a couple of weeks ago. In a small town in Greece. At first, I could not understand why I was getting DNS errors for so many sites. Then it occurred to me to check my connection with ifconfig, and voila: I had an IPv6 address, but no IPv4. In short: - Google, Wikipedia, Facebook worked fine - Expedia, Travelocity, Hotels.com, Flighthub, TripAdvisor, Travelzoo were not accessible - many sites found through Google were not accessible I am guessing that some Internet providers in Greece probably charge less for a service that does not involve allocating an IPv4 address for a downstream link. Still, considering that setting up an IPv6-to-IPv4 tunnel is relatively easy, I do not understand what stops these providers from setting up such a tunnel and using it for all of their downstream links who would be assigned an IPv4 address from a private address space. I also fail to understand why major travel sites such as Expedia are not yet IPv6-enabled. This makes no sense to me, especially considering that travelers are more likely than other categories of people to find themselves in an unusual hotspot with no access to public IPv4 address space.

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Re: [GTALUG] Was: Linux kernel 5.3 - Now: SPF and Anti Forgery
by Stewart C. Russell 22 Sep '19

22 Sep '19

On 2019-09-20 8:55 a.m., ac via talk wrote: > > Your sent email, came in marked as SPAM, and I wondered why... Don't forget: we had to implement Reply-To munging, otherwise mailing list messages were going out with incorrect DKIM information. Yes, about now someone usually quotes Chip Rosenthal's decade+ out-of-date article, but you either mess with headers or roughly ⅔ of your list recipients don't get e-mail. Most of them don't even get to see it as spam, either, as gmail et al quietly eat messages with bad DKIM information. cheers, Stewart

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August 2019 meeting videos
by Alex Volkov 22 Sep '19

22 Sep '19

Hello everyone, Here are the videos from our August 2019 lightning talks as a playlist -- https://www.youtube.com/playlist?list=PLUgE6dqIXiEuYoN9o1Jf0Zb2WLqKYHiHY Here are individual lightning talks: Art of Open Source with Dan Tapper -- https://www.youtube.com/watch?v=nS43PZm7pGo Recent Developments in Open-Source Assistive Technology with Stewart Russell -- https://www.youtube.com/watch?v=CyG76wo0JcU GPU computing in Debian with Alex Volkov -- https://www.youtube.com/watch?v=eMu7ynAwECY Our corporate (=tiny) Synology Data Centre with Ron Grimes -- https://www.youtube.com/watch?v=zSqiZwpLdQ4 JPEG with Seneca Cunningham -- https://www.youtube.com/watch?v=sbK8EE6D4YU Alex.

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480GB SSD for $60?
by William Park 22 Sep '19

22 Sep '19

What's going on in SSD market? https://www.canadacomputers.com/product_info.php?cPath=179_1088&item_id=139… -- William Park <opengeometry(a)yahoo.ca>

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Custom build: Which case?
by William Park 21 Sep '19

21 Sep '19

I built all of my computers, last one being a basic i3-4170. There is one part that I was never satisfied with, and that is "computer case". Selections at Canada Computers and Newegg are disappointing. If you were building a full-tower computer, which case would you buy? And where? -- William Park <opengeometry(a)yahoo.ca>

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Finding Old Memory
by Ivan Avery Frey 20 Sep '19

20 Sep '19

I'm looking for 2 GB single DDR 400 unbuffered ECC memory. Does anybody have such memory? Thanks, Ivan.

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Linux kernel 5.3.0
by William Park 20 Sep '19

20 Sep '19

I just tried kernel 5.3.0, and it's noticeably faster in opening windows. Not sure about overall throughput, though. -- William Park <opengeometry(a)yahoo.ca>

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Re: [GTALUG] SPF and Anti Forgery
by Dave Collier-Brown 20 Sep '19

20 Sep '19

On 2019-09-20 8:55 a.m., ac via talk wrote: > I have noticed something interesting in > the email you just sent to the list, so I have started a new thread... :) > > Your sent email, came in marked as SPAM, and I wondered why... > > yes, it is from Google, who sends a lot of spam, scams etc. but that > alone should not get it marked as spam... So, I looked and it is so > interesting... (maybe I need a life :) ) > > Dave, in the headers you literally have three email addresses: > Relayed For: <davec-b(a)rogers.com> - No SPF / Anti Forgery > Cc:<davecb.42(a)gmail.com> - Which is currently a -> ~all > Reply-To: davecb(a)spamcop.net and your SpamCop receive only addy, > also a -> ~all > > Which is why your relay is scored additional, as this is also what > spammers do very frequently (They use (rather abuse) @gmail with a reply > to of @outlook.com, etc) > > It is also interesting, that Google, probably in the interests of > becoming a better netizen?, has again started including relay headers, > again, after not including same for a long while... > > Anyway, long winded, but here is the question: Do you not find many > fake sent from and backscatter issues to your @rogers.com? If yes, why > even still use it in your Thunderbird config? > > Andre That's an artifact of fighting with outgoing mail relays: in principle it should go out via Rogers Yahoo, but it and Google take turns being broken. Spamcop was bought by cisco, who dropped their outgoing relay offering, otherwise that's all Id ever use. This one may be better or worse, as it's from my work address. Alas, they use paid-for Microsoft services, which may be broken in different ways. --dave -- David Collier-Brown, | Always do right. This will gratify System Programmer and Author | some people and astonish the rest dave.collier-brown(a)indexexchange.com | -- Mark Twain CONFIDENTIALITY NOTICE AND DISCLAIMER : This telecommunication, including any and all attachments, contains confidential information intended only for the person(s) to whom it is addressed. Any dissemination, distribution, copying or disclosure is strictly prohibited and is not a waiver of confidentiality. If you have received this telecommunication in error, please notify the sender immediately by return electronic mail and delete the message from your inbox and deleted items folders. This telecommunication does not constitute an express or implied agreement to conduct transactions by electronic means, nor does it constitute a contract offer, a contract amendment or an acceptance of a contract offer. Contract terms contained in this telecommunication are subject to legal review and the completion of formal documentation and are not binding until same is confirmed in writing and has been signed by an authorized signatory.

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Was: Linux kernel 5.3 - Now: SPF and Anti Forgery
by ac 20 Sep '19

20 Sep '19

On Fri, 20 Sep 2019 08:00:10 -0400 David Collier-Brown via talk <talk(a)gtalug.org> wrote: > On 2019-09-19 11:11 p.m., William Park via talk wrote: > > I just tried kernel 5.3.0, and it's noticeably faster in opening > > windows. Not sure about overall throughput, though. > I'd be interested in how quick it is in unblocking processes who just > got I/O. I have servers doing arrays of heavily parallel network > requests who race each other to get back, but /then / compete to get > a core to service them. > --dave > Please do accept my apology in advance, I do not mean or intend to hijack an existing thread, but I have noticed something interesting in the email you just sent to the list, so I have started a new thread... :) Your sent email, came in marked as SPAM, and I wondered why... yes, it is from Google, who sends a lot of spam, scams etc. but that alone should not get it marked as spam... So, I looked and it is so interesting... (maybe I need a life :) ) Dave, in the headers you literally have three email addresses: Relayed For: <davec-b(a)rogers.com> - No SPF / Anti Forgery Cc:<davecb.42(a)gmail.com> - Which is currently a -> ~all Reply-To: davecb(a)spamcop.net and your SpamCop receive only addy, also a -> ~all Which is why your relay is scored additional, as this is also what spammers do very frequently (They use (rather abuse) @gmail with a reply to of @outlook.com, etc) It is also interesting, that Google, probably in the interests of becoming a better netizen?, has again started including relay headers, again, after not including same for a long while... Anyway, long winded, but here is the question: Do you not find many fake sent from and backscatter issues to your @rogers.com? If yes, why even still use it in your Thunderbird config? Andre

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CentOS 8 - Sept 24th
by Scott Sullivan 19 Sep '19

19 Sep '19

With the release work for 7.7 completed, we now have a release date for CentOS 8. Tuesday Sept. 24th. https://wiki.centos.org/About/Building_8 As I already run a split CentOS/Fedora environment, I'm looking forward to the usual reduction in differences for my Ansible playbooks. -- Scott Sullivan

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