'for fun' I pasted the text of your email in to chatgpt, it had some
interesting advice:
*Verify User Exists*: - probably not your problem.
*Check User's Shell*: Ensure that the user "default" has a valid shell.
You can check the user's entry in |/etc/passwd|
|Good suggestion, imho, but you did imply you'd logged in as the user,
so this is also (probably) a red herring.|
||
*Home Directory*: Ensure the user "default" has a home directory.
*SSH Key/Password*: If you're trying to log in using SSH keys, ensure
that the public key is correctly placed in
|/home/default/.ssh/authorized_keys| and that the permissions are set
correctly
- since you've not logged in via SSH, this is probably also a herring.
However, the suggestion: If you’re using password authentication, make
sure the user has a password set Might be helpful.
I'm skipping firewall suggestion.
*Log Files*: Since |/var/log/faillog| is empty, also check
|/var/log/auth.log| for any messages related to SSH login attempts
- very good idea.
Three's more, but I'm guessing the log files are the most likely place
to start, after the suggestions everyone else gave.
On 10/21/24 23:22, Rusty Carruth via PLUG-discuss wrote:
The other questions are all great, but can you ssh from the server to
itself as the desired user? That is, ssh theSSHdude@localhost , which
should hopefully rule out network issues ;-)
I'll also mention that I had a weird issue with SSH where I could ssh
from machine A to machine B, but not from B to A! THAT turned out to
be a netmask issue! And ChatGPT ALMOST got the answer. You could try
your favorite AI to see if it can help, but be sure to give it more
info than you think you should - I should have given it the output of
ifconfig on both computers and it probably would have caught it....
On 10/21/24 18:46, Keith Smith via PLUG-discuss wrote:
Hi,
I am a little stuck.
I am trying to configure a user that will allow me to log into an
Ubuntu 24.04lts server via SSH.
I created a line : "AllowUsers default" in /etc/ssh/sshd_config
Then sudo systemctl restart ssh
Try to login and get "client_loop: send disconnect: Broken pipe"
sudo tail /var/log/faillog returns nothing.
I can SSH into the server from my Kubuntu desktop under the default
user created during server o/s install
A search says it is probably a network issue. Does not make sense
given I can SSH in using another user.
Any thoughts are much appreciated.
Keith
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