Home / ubuntu / Questions / 958440
Accepted
Mohammad Etemaddar
Asked: 2017-09-23 09:04:35 +0800 CST

Can not change ssh port | Server 16.04

  • 772

I want to change the ssh port from 22 to 2800. I tried to change the /etc/ssh/ssh_config and removed the # from Port line and changed the number to 2800. after trigger the command: service ssh restart The connection continued. When I tried to connect from the port 2800, It refused. The Content of /etc/ssh/ssh_config is: Removed commented lines

Host *
Port 2800
    SendEnv LANG LC_*
    HashKnownHosts yes
    GSSAPIAuthentication yes
    GSSAPIDelegateCredentials no

The command service ssh status gives the following output:

● ssh.service - OpenBSD Secure Shell server
   Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2017-09-22 20:31:45 IRST; 1s ago
 Main PID: 1825 (sshd)
    Tasks: 1
   Memory: 724.0K
      CPU: 5ms
   CGroup: /system.slice/ssh.service
           └─1825 /usr/sbin/sshd -D

Sep 22 20:31:45 GoodMind systemd[1]: Starting OpenBSD Secure Shell server...
Sep 22 20:31:45 GoodMind sshd[1825]: Server listening on 0.0.0.0 port 22.
Sep 22 20:31:45 GoodMind sshd[1825]: Server listening on :: port 22.
Sep 22 20:31:45 GoodMind systemd[1]: Started OpenBSD Secure Shell server.

I tried other ports too. But still it has the same status. What do I do wrong?

networking

2 Answers

  1. Best Answer

    Change the port not in the file:

    /etc/ssh/ssh_config but in
    /etc/ssh/sshd_config (file with d letter, meaning "daemon")

    Just edit this change and change uncomment and update the line 

    #Port 22

    Don't forget to restart your service as you done it with 

    service ssh restart
    • 19

  2. Your settings are correct but you changed them in the wrong config file. It should be /etc/ssh/sshd_config and you might want to restart the SSH service and open the new port your SSH Server is listening on.

    To do this, run the following commands:

    1. sudo service ssh restart or sudo systemctl restart sshd.service
    2. Open the port on your firewall sudo iptables -I INPUT -p tcp --dport 2800 -j ACCEPT.

    This should be all you need to accept connections on port 2800. You can also check what ports your machine is listening on with netstat -lt4 and you should see a line similar to

    tcp        0      0 *:2800                   *:*                     LISTEN

    Let me know if it works for you!

    • 2