Devuan logs - #630, boring messages

Message sent to [email protected], [email protected]:

Subject: bug#630: exim 4.94.5 installation configures IPv6 by default on IPv4 only machines
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Resent-Date: Sat, 13 Nov 2021 20:42:02 +0000
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Date: Sat, 13 Nov 2021 17:31:42 -0300
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Package: exim4
Version: 4.92-5
Severity: grave

I've previously reported this bug to Debian:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=999612

Unfortunately, a *single* reference to Devuan slipped by my editing.
As a result, the bug report was instantly/swiftly closed by the chap 
in charge with the reply being:

"Well, you are running an unsupported setup."

I really don't have time to set up a Debian installation to prove it 
is *also* a bug for Debian and probably every Debian based 
distribution. 

I had also previously exchanged opinions with respect to this problem 
on the exim-users list but without any success.

https://lists.exim.org/lurker/thread/20211113.163548.7007ca8c.en.html

So ...
Exim will not fix it because they actually don't think it is a bug.

Debian won't fix it because the person reporting the bug is running 
Exim under an unsupported configuration.

The truth of the matter is this:

Exim, as it comes straight from the official Debian repository, will 
install itself to use IPv6 *by default* in a system where the 
settings *explicitly* disable the IPv6 protocol.  

ie:

1.
The kernel command line includes the bit needed to disable ipv6 at
boot:

[code]
ipv6.disable=1
[/code]

2.
The /etc/hosts file has no machine readable IPv6 lines:

[code]
groucho@devuan:~$ cat /etc/hosts
#
127.0.0.1         localhost  devuan
#
# remmed to disable ip6
#::1                 localhost       ip6-localhost ip6-loopback
#fe00::0          ip6-localnet
#fe00::0          ip6-mcastprefix
#fe02::1          ip6-allnodes
#fe02::1          ip6-allrouters
groucho@devuan:~$
[/code]

3.
The /etc/ssh/ssh_config file includes the line needed to disable
ipv6:

[code]
groucho@devuan:~$ cat /etc/ssh/ssh_config
--- snip ---
AddressFamily inet     # instead of 'any' or 'inet6'
--- snip ---
groucho@devuan:~$
[/code]

In doing so, when Exim starts it generates a paniclog message:

[code]
IPv6 socket creation failed: Address family not supported by protocol
[/code]

Also, in a machine such as mine, running a VBox VM with a DNS (both 
configured explicitly disabling IPv6) it will also generate a 30s 
delay at boot while Exim makes an AAAA query to the DNS which (quite 
obviously) it won't answer.  

If this is not a bug ...

I'd appreciate any comments you'd care to make.

Thanks in advance.

Best,

A.

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X-Loop: [email protected]
From: "Devuan bug Tracking System" <[email protected]>
To: [email protected]
Subject: bug#630: Acknowledgement (exim 4.94.5 installation configures
 IPv6 by default on IPv4 only machines)
Message-ID: <[email protected]>
References: <[email protected]>
X-Devuan-PR-Message: ack 630
X-Devuan-PR-Package: exim4
Reply-To: [email protected]
Date: Sat, 13 Nov 2021 20:42:06 +0000

Thank you for filing a new bug report with Devuan.

You can follow progress on this bug here: 630: https://bugs.devuan.org/cgi/=
bugreport.cgi?bug=3D630.

This is an automatically generated reply to let you know your message
has been received.

Your message is being forwarded to the package maintainers and other
interested parties for their attention; they will reply in due course.

Your message has been sent to the package maintainer(s):
 [email protected]

If you wish to submit further information on this problem, please
send it to [email protected].

Please do not send mail to [email protected] unless you wish
to report a problem with the Bug-tracking system.

--=20
630: https://bugs.devuan.org/cgi/bugreport.cgi?bug=3D630
Devuan Bug Tracking System
Contact [email protected] with problems

Message sent to [email protected], [email protected]:

Subject: bug#630: exim 4.94.5 installation configures IPv6 by default on IPv4 only machines
Reply-To: Mark Hindley <[email protected]>, [email protected]
Resent-From: Mark Hindley <[email protected]>
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Resent-Date: Mon, 15 Nov 2021 11:02:01 +0000
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References: <[email protected]> <[email protected]>
Date: Mon, 15 Nov 2021 10:55:38 +0000
From: Mark Hindley <[email protected]>
To: [email protected], [email protected]
Message-ID: <[email protected]>
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In-Reply-To: <[email protected]>

Control: tags -1 debian

Hi,

Thanks for this.

On Sat, Nov 13, 2021 at 05:31:42PM -0300, [email protected] wrote:
> Package: exim4
> Version: 4.92-5
> Severity: grave
> 
> I've previously reported this bug to Debian:
> 
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=999612
> 
> Unfortunately, a *single* reference to Devuan slipped by my editing.
> As a result, the bug report was instantly/swiftly closed by the chap 
> in charge with the reply being:

I have just had a quick look through your Debian report. I don't think it is
closed, just downgraded to wishlist. I don't see any mention of Devuan or that
being the reason for his response

> "Well, you are running an unsupported setup."

I think this comment might relate to the fact that it is unsupported to comment
out the default ipv6 localhost entries in /etc/hosts.

If you reinstate them, does the pause on startup disappear?

[..]

> I'd appreciate any comments you'd care to make.

I am not sure there is anything we can do in Devuan as this isn't a forked
package and we use Debian's packages directly without recompilation.

Best wishes

Mark

Message received at [email protected]:

Date: Mon, 15 Nov 2021 10:55:38 +0000
From: Mark Hindley <[email protected]>
To: [email protected], [email protected]
Subject: Re: bug#630: exim 4.94.5 installation configures IPv6 by default on
 IPv4 only machines
Message-ID: <[email protected]>
References: <[email protected]>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <[email protected]>

Control: tags -1 debian

Hi,

Thanks for this.

On Sat, Nov 13, 2021 at 05:31:42PM -0300, [email protected] wrote:
> Package: exim4
> Version: 4.92-5
> Severity: grave
> 
> I've previously reported this bug to Debian:
> 
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=999612
> 
> Unfortunately, a *single* reference to Devuan slipped by my editing.
> As a result, the bug report was instantly/swiftly closed by the chap 
> in charge with the reply being:

I have just had a quick look through your Debian report. I don't think it is
closed, just downgraded to wishlist. I don't see any mention of Devuan or that
being the reason for his response

> "Well, you are running an unsupported setup."

I think this comment might relate to the fact that it is unsupported to comment
out the default ipv6 localhost entries in /etc/hosts.

If you reinstate them, does the pause on startup disappear?

[..]

> I'd appreciate any comments you'd care to make.

I am not sure there is anything we can do in Devuan as this isn't a forked
package and we use Debian's packages directly without recompilation.

Best wishes

Mark

Message received at [email protected]:

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From: Mark Hindley <[email protected]>
To: [email protected]
Subject: bug 630 is forwarded to https://bugs.debian.org/610918
Date: Wed, 11 Jan 2023 10:54:20 +0000
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Message-ID: <[email protected]>

forwarded 630 https://bugs.debian.org/610918
thanks