ssh login not working

[mister_v]

After an update of the sshd deamon.
I cant login.

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Connection reset by 192.168.1.1 port 23

I tried a restart of the server,
but it didn't work.

Anyone knows what to do ?

[Chris]

sounds to me, you have a problem with the config file

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/etc/ssh/sshd_config

Or perhaps it is not compatible with the new version of ssh-daemon.
Check your logs.

[mister_v]

I check for /var/log/auth.log (doesn't exist for me)
and /var/log/messages -> not much info

So I adapted the /etc/ssh/sshd_config -file to be more verbose.
LogLevel DEBUG3

That gave me some more info:

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userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedAlgorithms [preauth]

and here I'm stuck, because it should work with ssh-rsa...

[mister_v]

I tried with adding this line in /etc/ssh/sshd_config.

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PubkeyAcceptedAlgorithms=+ssh-rsa

Did not change...

[mister_v]

Tried setting in /etc/ssh/ssh_config in both server and host.

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HostkeyAlgorithms +ssh-rsa
PubkeyAcceptedAlgorithms +ssh-rsa

Still not good.

Tried using latest version from putty, still same error.

[mister_v]

after a few tries,
I found another errors message :

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sshd[26151]: debug1: permanently_set_uid: 22/22 [preauth]
sshd[26151]: debug3: ssh_sandbox_child: setting PR_SET_NO_NEW_PRIVS [preauth]
sshd[26151]: debug3: ssh_sandbox_child: attaching seccomp filter program [preauth]
sshd[26151]: debug1: ssh_sandbox_child: prctl(PR_SET_SECCOMP): Invalid argument [preauth]

I think the problem is that the kernel is to old.
3.16.1 . I have been lazy with the updates...