[plug] Looking for assistance with a recent Debian upgrade

[Dean Bergin]

Hello Joe,

Ok, can you post sanitised vvv(v) output from a login attempt?

Also, do you have console or out of band management access? You may want to
check the server logs as well (if you haven't already) and consider
increasing verbosity there too.

I'm happy to take a look at sanitised logs (preferably filtered to just
SSH) but no guarantees I can pinpoint the problem.
Just hoping to spot wny clues that would hint at what the next step is in
troubleshooting.


Kind Regards,

*Dean Bergin*.

On Tue, 17 Dec 2019, 18:10 Joe Aquilina, <joe at chem.com.au> wrote:

> Dean
>
> Yes, I have tried using the IPQoS throughput option, with no success.
>
> I have used -v(vv) when logging in, and am happy to provide examples when
> I login, but my knowledge is not good enough to be able to decipher what
> the extra verbosity is telling me.
>
> Cheers.
>
> Joe Aquilina
>
> On 17/12/19 4:55 pm, Dean Bergin wrote:
>
> Hello Joe,
>
> Have you tried SSH with the IPQoS throughout option? The following article
> suggested it (follow link from the post therein).
>
> Also, try increasing SSH verbosity with more  v's ;-)
>
> https://bbs.archlinux.org/viewtopic.php?id=239982
>
> Hope that helps.
>
>
> Kind Regards,
>
> *Dean Bergin*.
>
> On Tue, 17 Dec 2019, 16:18 Joe Aquilina, <joe at chem.com.au> wrote:
>
>> Ben
>>
>> Thanks for that, and here goes:
>>
>> We have two Debian systems here, along with a bunch of Kubuntu and
>> Windows systems. Early last week I upgraded the second of our Debian
>> systems from stretch to buster. A few days earlier, I had upgraded the
>> other Debian system, also from stretch to buster. That first upgrade went
>> fine and everything is working as expected.
>>
>> However the second (of course the more important system) did not upgrade
>> correctly. It is mostly ok, but I am unable to ssh in to that machine. When
>> I try to, I get this:
>>
>> packet_write_wait: Connection to 10.0.2.1 port 22: Broken pipe
>>
>> Searching on the net suggested I try adding ServerAliveInterval and
>> ServerAliveCountMax into the sshd_config file - no luck there.
>>
>> I have tried removing (and purging) openssh again with no luck.
>>
>> I have also tried disabling ufw in case there problem was there, no luck.
>>
>> Stopping ssh and sshd services and installing dropbear allows me to login
>> to the machine, and I can perform normal file operations. However, this
>> machine collects and distributes our emails for all users on our LAN and
>> the other machines can't access the machine. There is another (off-site)
>> Debian machine that does an important overnight folder sync which it is
>> currently unable to do as it can't ssh in.
>>
>> My Linux/Debian knowledge is obviously pretty limited, and I am not sure
>> what to try next.
>>
>> What else can I provide that might help me solve this?
>>
>> Sorry to be a bit longwinded and possibly not precise enough in my
>> description of the problem. Thanks in advance for any suggestions, advice
>> or assistance.
>>
>> Cheers.
>>
>> Joe Aquilina
>>
>> On 17/12/19 3:55 pm, Benjamin wrote:
>>
>> Hi Joe,
>>
>> Yep, sounds good to me...
>> ~ B
>> (PLUG President)
>>
>> On Tue, Dec 17, 2019 at 2:57 PM Joe Aquilina <joe at chem.com.au> wrote:
>>
>>> Hello. I have just subscribed to this list with this address after being
>>> a long time lurker using my home email address.
>>>
>>> I am looking for technical assistance after a not quite successful
>>> recent Debian upgrade (from stretch to buster). Is it appropriate for me
>>> to do so here? My Linux knowledge is still pretty limited and I have not
>>> been able to find a solution to the problem through extensive searches
>>> on the internet.
>>>
>>> If that is a reasonable request, I will detail the problem, and what I
>>> have tried to do to fix it, in a separate email.
>>>
>>> Thanks in advance.
>>>
>>> Joe Aquilina
>>>
>>> --
>>> Joe Aquilina
>>> Central Chemical Consulting Pty Ltd
>>> PO Box 2546 Malaga WA 6944 Australia
>>> 1/11 Narloo St Malaga 6090 Australia
>>> Tel: +61  8 9248 2739  Fax: +61  8 9248 2749
>>> joe at chem.com.au  www.chem.com.au
>>>
>>> _______________________________________________
>>> PLUG discussion list: plug at plug.org.au
>>> http://lists.plug.org.au/mailman/listinfo/plug
>>> Committee e-mail: committee at plug.org.au
>>> PLUG Membership: http://www.plug.org.au/membership
>>>
>>
>> --
>> Joe Aquilina
>> Central Chemical Consulting Pty Ltd
>> PO Box 2546 Malaga WA 6944 Australia
>> 1/11 Narloo St Malaga 6090 Australia
>> Tel: +61  8 9248 2739  Fax: +61  8 9248 2749joe at chem.com.au  www.chem.com.au
>>
>> _______________________________________________
>> PLUG discussion list: plug at plug.org.au
>> http://lists.plug.org.au/mailman/listinfo/plug
>> Committee e-mail: committee at plug.org.au
>> PLUG Membership: http://www.plug.org.au/membership
>
>
> --
> Joe Aquilina
> Central Chemical Consulting Pty Ltd
> PO Box 2546 Malaga WA 6944 Australia
> 1/11 Narloo St Malaga 6090 Australia
> Tel: +61  8 9248 2739  Fax: +61  8 9248 2749joe at chem.com.au  www.chem.com.au
>
> _______________________________________________
> PLUG discussion list: plug at plug.org.au
> http://lists.plug.org.au/mailman/listinfo/plug
> Committee e-mail: committee at plug.org.au
> PLUG Membership: http://www.plug.org.au/membership
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