[arch-general] Recent updates cause ssh sessions to disconnect/reauth repeatedly for ~20 seconds?

[David C. Rankin]

On 08/13/2017 07:03 AM, LoneVVolf wrote:
> On 13-08-17 01:09, David C. Rankin wrote:
>> All,
>>
>>    After updates in the past day or two, I see new behavior for my idle ssh
>> connections that authorize as normal, but then are systematically disconnected
>> forcing a reauth at regular intervals of one-per second, for about 20 seconds.
>>
>> Aug 12 17:46:11 valhalla sshd[3095]: userauth_pubkey: key type ssh-dss not in
>> PubkeyAcceptedKeyTypes [preauth]
> 
> Hi, that type of keys was disabled for security reasons in 2015, are you sure
> these connections from 192.168.6.104 are genuine ?
> What kind of device is at 192.168.6.104 ?
> 
> https://wiki.archlinux.org/index.php/Secure_Shell#id_dsa_refused_by_OpenSSH_7.0
> 
> LW

That's just an old key in the .ssh directory. It isn't used to connect. The
ECDSA key is the one that connects:

Aug 12 17:46:11 valhalla sshd[3095]: userauth_pubkey: key type ssh-dss not in
PubkeyAcceptedKeyTypes [preauth]
Aug 12 17:46:11 valhalla sshd[3095]: Accepted publickey for david from
192.168.6.104 port 50778 ssh2: ECDSA SHA256:foo

-- 
David C. Rankin, J.D.,P.E.