On 9/5/23 00:52, Michael Tokarev wrote:
04.09.2023 23:23, gene heskett wrote:
..
Ah contraire, Eduardo. My location since 1984 is in the middle
northern area of WV, USA, And I am a minimum of 150 kilometers from
the nearest ipv6 enabled network connection. I'm not even sure my
cable modem, fur
04.09.2023 23:23, gene heskett wrote:
..
Ah contraire, Eduardo. My location since 1984 is in the middle northern area of WV, USA, And I am a minimum of 150 kilometers from the nearest ipv6
enabled network connection. I'm not even sure my cable modem, furnished by Shentel about 7 to 10 years ago,
Damn. Forgot to hit "reply all" -- my bad
Forwarded Message
Subject: Re: DOvecot requires both IPv4 and IPV6 to start
Date: Mon, 4 Sep 2023 15:35:51 -0700
From: Stephen Satchell
Reply-To: l...@satchell.net
To: Arjen de Korte
On 9/4/23 2:40 PM, Arjen de Korte w
On 9/4/23 15:40, Arjen de Korte wrote:
Citeren Shawn Heisey :
An interesting read:
https://cr.yp.to/djbdns/ipv6mess.html
FUD.
This document was written something like two decades ago and pretty much
all arguments against IPv6 are no longer relevant anymore. In most cases
nowadays, the use
On 9/4/23 1:41 PM, TWHG Technical via dovecot wrote:
Sep 04 10:45:29 ourdomain dovecot[63336]: ^[[0;1;31m^[[0;1;39m^[[0;1;31mmaster:
Error: service(imap-login): listen(::, 143) failed: A>
Sep 04 10:45:29 ourdomain dovecot[63336]: Error: socket() failed: Address
family not supported by protocol
Citeren Shawn Heisey :
An interesting read:
https://cr.yp.to/djbdns/ipv6mess.html
FUD.
This document was written something like two decades ago and pretty
much all arguments against IPv6 are no longer relevant anymore. In
most cases nowadays, the user experience for IPv6 will be far supe
On 9/4/23 13:42, TWHG Technical via dovecot wrote:
I believe it really would be good practice to fallback to IPV4 only listeners
if IPV6 listener fails. Rather than crash out.
On my previous reply, I had not yet read the other messages. They were
part of another thread in Thunderbird that I
--
From: "Shawn Heisey"
To: "dovecot"
Sent: Monday, 4 September, 2023 21:13:42
Subject: Re: DOvecot requires both IPv4 and IPV6 to start
On 9/4/23 12:36, Michael Peddemors wrote:
> However, I 'get' this persons' opinion, from a developers perspective.
>
On 9/4/23 12:20, Eduardo M KALINOWSKI via dovecot wrote:
On 04/09/2023 11:12, TWHG Technical via dovecot wrote:
But that is not this issue. The issue is that dovecot is assuming that
IPV6 is there and crashes out if it's not. Hacking the config to only
listen on IP4 solves the problem but not w
* TWHG Technical via dovecot:
> I hope this is the right place to start.
Not really. What you are asking for (changing the default configuration
provided by Ubuntu) is something better asked of the Ubuntu package
maintainers, should they even agree with your assessment. They might
tell you that a
On 9/4/23 12:36, Michael Peddemors wrote:
However, I 'get' this persons' opinion, from a developers perspective.
The system should either run, or provide a clear reason why it didn't
startup (that reason could be .. You have selected * but IPv6 is not
available). Doesn't really matter what the
Sent: Monday, 4 September, 2023 19:36:45
Subject: Re: DOvecot requires both IPv4 and IPV6 to start
On 2023-09-04 08:58, Eduardo M KALINOWSKI via dovecot wrote:
> On 04/09/2023 11:12, TWHG Technical via dovecot wrote:
>> But that is not this issue. The issue is that dovecot is assuming th
On 2023-09-04 08:58, Eduardo M KALINOWSKI via dovecot wrote:
On 04/09/2023 11:12, TWHG Technical via dovecot wrote:
But that is not this issue. The issue is that dovecot is assuming that
IPV6 is there and crashes out if it's not. Hacking the config to only
listen on IP4 solves the problem but n
On 04/09/2023 11:12, TWHG Technical via dovecot wrote:
But that is not this issue. The issue is that dovecot is assuming that IPV6 is
there and crashes out if it's not. Hacking the config to only listen on IP4
solves the problem but not while installing from standard repos to install the
curre
On 9/4/23 8:11 AM, Jochen Bern wrote:
Define "disabled", please. I don't have many Ubuntu systems around, but
on the RHEL/CentOS/Fedora ones, even if they have IPv6 set to "Ignore",
the interfaces get link-local IPv6 addresses assigned - at which point
IPv6 LISTENs will work, too.
Of course,
IPV6 is disabled in the grub command line. So before the OS boots. So there is
no IPV6 support in the system. Unless one enables it in the Grub bootloader.
Cheers
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On 04.09.23 13:24, TWHG Technical wrote:
on systems that have IP6 disabled dovecot will not start.
Define "disabled", please. I don't have many Ubuntu systems around, but
on the RHEL/CentOS/Fedora ones, even if they have IPv6 set to "Ignore",
the interfaces get link-local IPv6 addresses assig
I think we are off topic.
We have a network policy that until such time as we have fully implemented the
same security we have on our IPV4 network we simply do not allow IPV6 as it is
another attack vector we are not fully upto speed on. So we block all IPV6 at
the perimeter and on all switche
> On 04/09/2023 16:30 EEST TWHG Technical via dovecot
> wrote:
>
>
> I have tried replying twice.
>
> We have IPV6 disabled for security reasons on all server builds. An installer
> script failed which is how we caught this issue. We can see it is due to the
> config line.
>
> A gracef
TWHG Technical via dovecot schreef op 2023-09-04 15:30:
I have tried replying twice.
We have IPV6 disabled for security reasons on all server builds.
IPv6 is secure, so that is not needed.
An installer script failed which is how we caught this issue. We can
see it is due to the config line.
Hi,
We have IPV6 disabled for security reasons on all server builds.
Why did you disable it for security reasons?
Regards
Bjoern
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I have tried replying twice.
We have IPV6 disabled for security reasons on all server builds. An installer
script failed which is how we caught this issue. We can see it is due to the
config line.
A graceful fallback to IPV4 if the IPV6 stack is not available would seem to be
an elegant solu
TWHG Technical via dovecot schreef op 2023-09-04 13:24:
Hello,
I hope this is the right place to start. Ubuntu server the default
listener configuration in dovecot.conf uses both IP4 and IP6 on systems
that have IP6 disabled dovecot will not start.
Is it possible to set the default to:
list
Am 04.09.23 um 13:24 schrieb TWHG Technical via dovecot:
Hello,
I hope this is the right place to start. Ubuntu server the default listener configuration in dovecot.conf uses both IP4 and IP6
I think that is a good default value.
on systems that have IP6 disabled dovecot will not start.
Hello,
I hope this is the right place to start. Ubuntu server the default listener
configuration in dovecot.conf uses both IP4 and IP6 on systems that have IP6
disabled dovecot will not start.
Is it possible to set the default to:
listen = * to only bind to IP4 for installation and initial
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