Yongjun Cho
Summary (AI Generation)

Setting up SSH on Fedora Linux involves checking and starting the SSH daemon service, modifying the default port for enhanced security, and properly configuring the SSH settings through the sshd_config file. The process requires administrative privileges and includes verifying the service status, editing configuration files, and restarting the service to apply changes. While straightforward, proper SSH configuration is crucial for secure remote system access and management.

Setting SSH on Fedora ​

WARNING

Tested on Fedora Linux

Check whether SSH is running on the server side (Fedora in my case) ​

bash
systemctl status sshd.service

Start the sshd service ​

bash
systemctl start sshd.service

Change the default port ​

Open the SSH configuration file

bash
sudo vi /etc/ssh/sshd_config

Find and locate to the following line ​

bash
#Port 22

Remove the # and change the port number ​

bash
Port {YOUR PORT NUMBER}

Save the file and exit the editor ​

In vi, you can do this by pressing Esc, then typing :wq and pressing Enter.

Restart the SSH service for the changes to take effect: ​

bash
sudo systemctl restart sshd

Ensure the new port is allowed through your firewall ​

For example, if you're using ufw:

bash
sudo ufw allow {YOUR PORT NUMBER}/tcp

WARNING

Usually, this works on other distros, but since we're on an SELinux system, we need to do one more thing.

Allow SSH connections in SELinux ​

Add a new port to the SELinux policy to allow SSH connections

Don't disable SELinux. Just add your port to SELinux and keep your system safer.

bash
sudo semanage port -a -t ssh_port_t -p tcp {YOUR PORT NUMBER}

Confirm that SSH is listening on the new port ​

bash
sudo netstat -tuln | grep {YOUR PORT NUMBER}