• Re: Linux advocacy

    From Richard Kettlewell@21:1/5 to Richard Kettlewell on Sun May 18 09:49:21 2025
    Richard Kettlewell <invalid@invalid.invalid> writes:
    vallor <vallor@cultnix.org> writes:
    Some of us folks are trying to be topical in cola. Still, it needs
    a fairly robust killfile, because it gets a lot of political spam.

    (For a while, I was posting build reports in there as new
    kernels came out, but there doesn't seem to be much interest.)

    One could argue that Linux advocacy isn't all that necessary
    anymore, since it has already all but taken over the planet.
    (Except for the desktop, of course -- that is still a Windows world.)

    There are still occasionally Linux-v-something-else arguments and in principle is a good place to tell people to take those to. In practice
    ^COLA
    some people have zero self control.

    --
    https://www.greenend.org.uk/rjk/

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  • From Richard Kettlewell@21:1/5 to vallor on Sun May 18 09:46:37 2025
    vallor <vallor@cultnix.org> writes:
    Some of us folks are trying to be topical in cola. Still, it needs
    a fairly robust killfile, because it gets a lot of political spam.

    (For a while, I was posting build reports in there as new
    kernels came out, but there doesn't seem to be much interest.)

    One could argue that Linux advocacy isn't all that necessary
    anymore, since it has already all but taken over the planet.
    (Except for the desktop, of course -- that is still a Windows world.)

    There are still occasionally Linux-v-something-else arguments and in
    principle is a good place to tell people to take those to. In practice
    some people have zero self control.

    --
    https://www.greenend.org.uk/rjk/

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  • From Carlos E. R.@21:1/5 to All on Sun May 18 11:07:14 2025
    On 2025-05-18 05:45, c186282 wrote:
      As for IPV6 ... my ISP doesn't use it. NO use at
      all - so I disable it to prevent problems.

    I don't have any problem with it enabled.

    I think I had some issue years ago, bu I have forgotten about it.

    --
    Cheers,
    Carlos E.R.

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  • From Marc Haber@21:1/5 to Carlos E. R. on Mon May 19 08:14:10 2025
    "Carlos E. R." <robin_listas@es.invalid> wrote:
    On 2025-05-18 05:45, c186282 wrote:
      As for IPV6 ... my ISP doesn't use it. NO use at
      all - so I disable it to prevent problems.

    I don't have any problem with it enabled.

    I think I had some issue years ago, bu I have forgotten about it.

    that's how it's supposed to work. On the Internet Exchance Points, the
    majority of traffic is IPv6 in these days.

    Greetings
    Marc
    --
    ---------------------------------------------------------------------------- Marc Haber | " Questions are the | Mailadresse im Header Rhein-Neckar, DE | Beginning of Wisdom " |
    Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 6224 1600402

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  • From Carlos E. R.@21:1/5 to Marc Haber on Mon May 19 12:27:35 2025
    On 2025-05-19 08:14, Marc Haber wrote:
    "Carlos E. R." <robin_listas@es.invalid> wrote:
    On 2025-05-18 05:45, c186282 wrote:
      As for IPV6 ... my ISP doesn't use it. NO use at
      all - so I disable it to prevent problems.

    I don't have any problem with it enabled.

    I think I had some issue years ago, bu I have forgotten about it.

    that's how it's supposed to work. On the Internet Exchance Points, the majority of traffic is IPv6 in these days.

    It is my ISP who has a problem. They haven't said which, but my educated
    guess is that many of the routers they installed are faulty. For
    example, mine does not protect the LAN with a firewall on IPv6, all
    machines are directly exposed.

    Thus, after the beta, there is nothing known about when actual
    deployment will happen.

    --
    Cheers,
    Carlos E.R.

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  • From Marc Haber@21:1/5 to Carlos E. R. on Mon May 19 14:54:36 2025
    "Carlos E. R." <robin_listas@es.invalid> wrote:
    On 2025-05-19 08:14, Marc Haber wrote:
    "Carlos E. R." <robin_listas@es.invalid> wrote:
    On 2025-05-18 05:45, c186282 wrote:
      As for IPV6 ... my ISP doesn't use it. NO use at
      all - so I disable it to prevent problems.

    I don't have any problem with it enabled.

    I think I had some issue years ago, bu I have forgotten about it.

    that's how it's supposed to work. On the Internet Exchance Points, the
    majority of traffic is IPv6 in these days.

    It is my ISP who has a problem. They haven't said which, but my educated >guess is that many of the routers they installed are faulty. For
    example, mine does not protect the LAN with a firewall on IPv6, all
    machines are directly exposed.

    I would only expect firewall functionality on a device that claims to
    be a firewall. That being said, such functionality is vitally
    important for an end user network.

    Can you disable IPv6 on the router? That would be easier than doing so
    on every device on the network, and also easier to revert should the
    IPv6 support of your ISP become useable at some future point in time.

    Greetings
    Marc
    --
    ---------------------------------------------------------------------------- Marc Haber | " Questions are the | Mailadresse im Header Rhein-Neckar, DE | Beginning of Wisdom " |
    Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 6224 1600402

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  • From Nuno Silva@21:1/5 to Marc Haber on Tue May 20 09:36:15 2025
    On 2025-05-20, Marc Haber wrote:

    vallor <vallor@cultnix.org> wrote:
    On Sun, 18 May 2025 10:02:22 +0200, Marc Haber >><mh+usenetspam1118@zugschl.us> wrote in <100c46e$3c1el$1@news1.tnib.de>:
    As for IPV6 ... my ISP doesn't use it. NO use at all - so I disable
    it to prevent problems.

    That's a really stupid idea.

    I suggest he enable it from time to time to see if the ISP
    has got it working.

    I suggest not disabling it in in the first place. It doesn't hurt when
    it's unused and unconfigured.

    Maybe what's missing here for some of the affected people is configuring address lookup to prefer IPv4 if they're using nameservers that return
    AAAA records?

    (Just a wild guess, but fitting enough that it's probably a good idea to
    drop this here:)

    news://news.gmane.io/m3msju6x5x.fsf@lugabout.jhcloos.org

    Although I'm not sure, from the gai.conf online manual page, that just
    the mentioned line is sufficient, given it's said to disable the
    "default table". I didn't test this myself.

    --
    Nuno Silva

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  • From The Natural Philosopher@21:1/5 to Marc Haber on Tue May 20 10:38:51 2025
    On 20/05/2025 09:00, Marc Haber wrote:
    vallor <vallor@cultnix.org> wrote:
    On Sun, 18 May 2025 10:02:22 +0200, Marc Haber
    <mh+usenetspam1118@zugschl.us> wrote in <100c46e$3c1el$1@news1.tnib.de>: >>>> As for IPV6 ... my ISP doesn't use it. NO use at all - so I disable >>>> it to prevent problems.

    That's a really stupid idea.

    I suggest he enable it from time to time to see if the ISP
    has got it working.

    I suggest not disabling it in in the first place. It doesn't hurt when
    it's unused and unconfigured.

    Oh but it does, when you get ipV6 addresses returned by DNS and you cant
    reach them...


    Greetings
    Marc

    --
    "It was a lot more fun being 20 in the 70's that it is being 70 in the 20's" Joew Walsh

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  • From Carlos E. R.@21:1/5 to Nuno Silva on Tue May 20 11:46:44 2025
    On 2025-05-20 10:36, Nuno Silva wrote:
    On 2025-05-20, Marc Haber wrote:



    Maybe what's missing here for some of the affected people is configuring address lookup to prefer IPv4 if they're using nameservers that return
    AAAA records?

    (Just a wild guess, but fitting enough that it's probably a good idea to
    drop this here:)

    news://news.gmane.io/m3msju6x5x.fsf@lugabout.jhcloos.org

    Although I'm not sure, from the gai.conf online manual page, that just
    the mentioned line is sufficient, given it's said to disable the
    "default table". I didn't test this myself.

    I knew and did the trick in the past, but I have forgotten, so I asked
    chatgpt:

    Method 1: Edit /etc/gai.conf to prefer IPv4

    The /etc/gai.conf file is used by the GNU C Library (glibc) to influence address selection when a hostname resolves to multiple addresses (e.g.,
    both A and AAAA records).

    Open the file in a text editor as root:

    sudo nano /etc/gai.conf

    Find the following line (it’s usually commented out):

    #precedence ::ffff:0:0/96 100

    Uncomment the line by removing the #:

    precedence ::ffff:0:0/96 100

    This tells the system to prefer IPv4-mapped addresses over IPv6.

    Save and exit the editor.

    This change takes effect immediately for new processes that use glibc’s getaddrinfo() function.

    Method 2: Disable IPv6 (not recommended unless necessary)

    (skip)

    Verify Preference

    You can test the preference with getent:

    getent ahosts example.com

    The top address should be IPv4 if the change worked.



    --
    Cheers,
    Carlos E.R.

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  • From Marc Haber@21:1/5 to The Natural Philosopher on Tue May 20 12:21:24 2025
    The Natural Philosopher <tnp@invalid.invalid> wrote:
    On 20/05/2025 09:00, Marc Haber wrote:
    vallor <vallor@cultnix.org> wrote:
    On Sun, 18 May 2025 10:02:22 +0200, Marc Haber
    <mh+usenetspam1118@zugschl.us> wrote in <100c46e$3c1el$1@news1.tnib.de>: >>>>> As for IPV6 ... my ISP doesn't use it. NO use at all - so I disable >>>>> it to prevent problems.

    That's a really stupid idea.

    I suggest he enable it from time to time to see if the ISP
    has got it working.

    I suggest not disabling it in in the first place. It doesn't hurt when
    it's unused and unconfigured.

    Oh but it does, when you get ipV6 addresses returned by DNS and you cant >reach them...

    And where is the problem with that?

    Greetings
    Marc
    --
    ---------------------------------------------------------------------------- Marc Haber | " Questions are the | Mailadresse im Header Rhein-Neckar, DE | Beginning of Wisdom " |
    Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 6224 1600402

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  • From Marc Haber@21:1/5 to Nuno Silva on Tue May 20 12:20:47 2025
    Nuno Silva <nunojsilva@invalid.invalid> wrote:
    On 2025-05-20, Marc Haber wrote:

    vallor <vallor@cultnix.org> wrote:
    On Sun, 18 May 2025 10:02:22 +0200, Marc Haber >>><mh+usenetspam1118@zugschl.us> wrote in <100c46e$3c1el$1@news1.tnib.de>: >>>>> As for IPV6 ... my ISP doesn't use it. NO use at all - so I disable >>>>> it to prevent problems.

    That's a really stupid idea.

    I suggest he enable it from time to time to see if the ISP
    has got it working.

    I suggest not disabling it in in the first place. It doesn't hurt when
    it's unused and unconfigured.

    Maybe what's missing here for some of the affected people is configuring >address lookup to prefer IPv4 if they're using nameservers that return
    AAAA records?

    An IPv4 only host will just ignore any AAAA records sent to them. Even
    if IPv6 is enabled but not available, the host will either immediately
    see that it doesn't have working IPv6, or it will go through the
    motions of inspecting the IPv6 routing table, finding that there is no
    default route and immediately jump back to the application.

    (Just a wild guess, but fitting enough that it's probably a good idea to
    drop this here:)

    news://news.gmane.io/m3msju6x5x.fsf@lugabout.jhcloos.org

    Although I'm not sure, from the gai.conf online manual page, that just
    the mentioned line is sufficient, given it's said to disable the
    "default table". I didn't test this myself.

    I would advise against doing this.

    Greetings
    Marc
    --
    ---------------------------------------------------------------------------- Marc Haber | " Questions are the | Mailadresse im Header Rhein-Neckar, DE | Beginning of Wisdom " |
    Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 6224 1600402

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  • From The Natural Philosopher@21:1/5 to Marc Haber on Tue May 20 11:33:38 2025
    On 20/05/2025 11:21, Marc Haber wrote:
    The Natural Philosopher <tnp@invalid.invalid> wrote:
    On 20/05/2025 09:00, Marc Haber wrote:
    vallor <vallor@cultnix.org> wrote:
    On Sun, 18 May 2025 10:02:22 +0200, Marc Haber
    <mh+usenetspam1118@zugschl.us> wrote in <100c46e$3c1el$1@news1.tnib.de>: >>>>>> As for IPV6 ... my ISP doesn't use it. NO use at all - so I disable >>>>>> it to prevent problems.

    That's a really stupid idea.

    I suggest he enable it from time to time to see if the ISP
    has got it working.

    I suggest not disabling it in in the first place. It doesn't hurt when
    it's unused and unconfigured.

    Oh but it does, when you get ipV6 addresses returned by DNS and you cant
    reach them...

    And where is the problem with that?

    Suddenly you cant find websites

    Greetings
    Marc

    --
    “Politics is the art of looking for trouble, finding it everywhere, diagnosing it incorrectly and applying the wrong remedies.”
    ― Groucho Marx

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  • From Marc Haber@21:1/5 to The Natural Philosopher on Tue May 20 17:48:43 2025
    The Natural Philosopher <tnp@invalid.invalid> wrote:
    On 20/05/2025 11:21, Marc Haber wrote:
    The Natural Philosopher <tnp@invalid.invalid> wrote:
    On 20/05/2025 09:00, Marc Haber wrote:
    vallor <vallor@cultnix.org> wrote:
    On Sun, 18 May 2025 10:02:22 +0200, Marc Haber
    <mh+usenetspam1118@zugschl.us> wrote in <100c46e$3c1el$1@news1.tnib.de>: >>>>>>> As for IPV6 ... my ISP doesn't use it. NO use at all - so I disable >>>>>>> it to prevent problems.

    That's a really stupid idea.

    I suggest he enable it from time to time to see if the ISP
    has got it working.

    I suggest not disabling it in in the first place. It doesn't hurt when >>>> it's unused and unconfigured.

    Oh but it does, when you get ipV6 addresses returned by DNS and you cant >>> reach them...

    And where is the problem with that?

    Suddenly you cant find websites

    No. Get yourself acquainted with how DNS and the rest of the Internet
    works. When you have accumulated enough clue to be a worthy discussion
    partner, come back.

    Until then I'll stop wasting my time with you.

    --
    ---------------------------------------------------------------------------- Marc Haber | " Questions are the | Mailadresse im Header Rhein-Neckar, DE | Beginning of Wisdom " |
    Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 6224 1600402

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  • From Lawrence D'Oliveiro@21:1/5 to Carlos E. R. on Wed Jun 25 09:08:05 2025
    On Tue, 20 May 2025 11:46:44 +0200, Carlos E. R. wrote:

    Method 1: Edit /etc/gai.conf to prefer IPv4

    Learn something new every day ...

    <https://manpages.debian.org/gai.conf(5)>

    ... (e.g., both A and AAAA records).

    In the beginning (of IPv6), there were both “A6” and “AAAA” records. “A6”
    records used a complex tree-structured scheme for grouping addresses for
    naming purposes, while “AAAA” used a simple one-name, one-address format like “A” records do for IPv4.

    Later, it was decided that one of those IPv6 record types wasn’t worth supporting, and so it was dropped. Of course it was the one with shorter, easier-to-say name; while the one with the longer-and-harder-to-say name
    became the standard way to do it ...

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  • From Marc Haber@21:1/5 to Lawrence D'Oliveiro on Wed Jun 25 11:25:01 2025
    Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
    Later, it was decided that one of those IPv6 record types wasn’t worth >supporting, and so it was dropped. Of course it was the one with shorter, >easier-to-say name; while the one with the longer-and-harder-to-say name >became the standard way to do it ...

    I don't find "quad-A" harder to say than "A-Six".

    Grüße
    Marc
    --
    ---------------------------------------------------------------------------- Marc Haber | " Questions are the | Mailadresse im Header Rhein-Neckar, DE | Beginning of Wisdom " |
    Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 6224 1600402

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