The sshd pam setting is the one you want to make sure works because that appears to link sshd access to valid system users for ssh access. This is a link to my bog stock login. and any user I create (as a system user) can access via SSH. except for root. but root cannot even log in at this point. Ubuntu Stock sshdconfig On Tue, Oct 22, 2024 at 2:32 AM Rusty Carruth via PLUG-discuss < plug-discuss@lists.phxlinux.org> wrote: > '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 > > > --------------------------------------------------- > PLUG-discuss mailing list: PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > https://lists.phxlinux.org/mailman/listinfo/plug-discuss > > --------------------------------------------------- > PLUG-discuss mailing list: PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > https://lists.phxlinux.org/mailman/listinfo/plug-discuss > > --------------------------------------------------- > PLUG-discuss mailing list: PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > https://lists.phxlinux.org/mailman/listinfo/plug-discuss > -- A mouse trap, placed on top of your alarm clock, will prevent you from rolling over and going back to sleep after you hit the snooze button. Stephen