Login with SSH authorized key with changed SSH port

Question

I changed my SSH port in the /etc/ssh/sshd_config file and then restarted the ssh service. I implemented fail2ban and updated the port to my SSH under that config. I also then implemented the UFW firewall and allowed incoming connections to my new SSH port.

However, when I try and login with my SSH key using ssh -i /Users/myuser/.ssh/vpsssh user@555.555.555.555 it's trying to connect to port 22 instead of the defined port I have.

Server and client do not about each other automatically. They both use the default port 22, unles is changed, on sshd_config for server, or specified on command for cliente like here — bistoco, Jan 22 '19 at 15:35
They could be trying to login to an Ubuntu server from a Windows PC, which I think is still on topic. — Arronical, Jan 22 '19 at 17:13
Is there a reason you're using a different key for each host you connect to? — R.. GitHub STOP HELPING ICE, Jan 23 '19 at 17:41

score 27 · Accepted Answer · edited Jan 22 '19 at 15:43

27

You can specify a non-default port on the ssh client command line using the -p option. From man ssh:

 -p port
         Port to connect to on the remote host.  This can be specified on
         a per-host basis in the configuration file.

You may wish to put both the port number and the identity file location for the host in a ~/.ssh/config file so that they don't need to be specified every time on the command line.

Ex.

Host myremotehost
  Hostname      555.555.555.555
  User          user
  Port          20002
  IdentityFile  /Users/myuser/.ssh/vpsssh

Then you will be able to use:

ssh myremotehost

edited Jan 22 '19 at 15:43

pa4080

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answered Jan 22 '19 at 15:35

steeldriver

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Probably useful to many when you start defining that kind of configuration: How do I configure SSH so it dosen't try all the identity files automatically?. – Giacomo Alzetta Jan 23 '19 at 14:46

score 5 · Answer 2 · answered Jan 23 '19 at 01:30

5

Note that ssh accepts commands in the URI form, such as ssh://user@host.com:<port>. Based on that, what I do when logging in to a remote server with a private key is the following:

ssh -i ~/.ssh/id_rsa ssh://myuser@domain_name.com:2222

answered Jan 23 '19 at 01:30

Sergiy Kolodyazhnyy

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This answer over at "Unix Linux S.O." https://unix.stackexchange.com/questions/75668/why-doesnt-the-ssh-command-follow-rfc-on-uri explains that URI is actually not accepted by SSH. I have tried this in my updated Ubuntu 20.04 and it didn't work so I don't think this answer is valid. – badc0de Sep 22 '21 at 12:53

Login with SSH authorized key with changed SSH port

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