sshd.conf- did this change in V90

[keat63]

Every Friday, I SFTP the backup folder to my local PC, I've been doing this for 5 or 6 years.
This week, my FTP client was responding with:

FATAL ERROR: No supported authentication methods available (server sent: publickey,gssapi-keyex,gssapi-with-mic)

Nothing has changed at my end.

I eventually found in etc/ssh/ssd.conf that the entry for PasswordAuthenication was configured as no.
I reconfigured for yes, and I can now gain ftp access.
I haven't changed this, so what did?

I updated to WHM V90 last weekend, could this be the reason?

I allowed CPanel access for a support ticket earlier in the week.
Could generating an SSH key for Cpanel access cause this?

 

[andrew.n]

Did you gave access to the cPanel tech using an SSH key or password? @cPanelLauren might have some insight on the new cPanel version but generally it shouldn't cause this behaviour.

 

[keat63]

I gave Cpanel access via SSH key.

However, I just ran an experiment.
I created a new SSH key to try for my SFTP download, this doesn't appear to have overwritten sshd.conf and hasn't reverted back to 'no'

 

[andrew.n]

Right, it is weird. I do know that if you let their system to configure the SSH key it messes /etc/hosts.allow and deny up but it shouldn't touch the config file so that leave the overnight update causing this....

 

[cPanelLauren]

Oh, that's interesting, so you're saying PasswordAuth was randomly set to no? I've not run into this, or I would assume that my own server would have locked me out, since I use PasswordAuth. Did you make any other changes (no matter how trivial they may seem) besides updating to v90?

 

[keat63]

I don't recall making any changes.
I connected using password auth as I usually do every Friday.
I updated to v90 over the weekend.
The Friday after, I couldn't connect.

The only thing I did between Monday and Friday was to create an SSH key for Cpanel support access.
In hindsight, I ought to have checked the time stamp on ssd.conf before i modified it to yes, but it was too late by then.

Very odd.

 

[cPanelLauren]

What was the ticket ID for the ticket you created the SSH key for? I'm curious if there's a record in the ticket of whether or not it was changed?