Changing SSH Port on CentOS/RHEL 7/8

Follow steps discussed below to change SSH port on CentOS / RHEL / Fedora server or Desktop with SELinux running in Enforcing mode.

1. Step 1: Backup Current SSH configuration. ...
2. Step 2: Change SSH service port. ...
3. Step 3: Allow new SSH port on SELinux. ...
4. Step 4: Open SSH port on Firewalld. ...
5. Step 5: Restart sshd service.

1. How do I change the default port for SSH in Linux?
2. Can we change SSH port?
3. What port should I change SSH to?
4. How do I add a secondary port ssh port 22?
5. How do I change my ports?
6. How do I change my default port?
7. How do I SSH to a specific port?
8. Can ssh listen on multiple ports?
9. What is SSH port number?
10. Is it worth to change SSH port?
11. What does changing SSH port do?
12. Should I change default ports?

How do I change the default port for SSH in Linux?

To change the SSH port:

1. Log on to the server as an administrator.
2. Open the SSH configuration file sshd_config with the text editor vi: vi /etc/ssh/sshd_config.
3. Search for the entry Port 22.
4. Replace port 22 with a port between 1024 and 65536.

Can we change SSH port?

Changing the SSH port number

Log in to the server as root using SSH. Open the /etc/ssh/sshd_config file in your preferred text editor (nano, vi, etc.). ... Change 7822 to the new port number that you want to use. Save the changes to the /etc/ssh/sshd_config file, and then exit the text editor.

What port should I change SSH to?

Many server configuration guides recommend that the SSH port should be changed to something > 1024, for obscurity and to avoid conflicts.

How do I add a secondary port ssh port 22?

In /etc/ssh/sshd_config , make the following change. Look for the line that says Port 22 and add a similar line under it. Save the file and restart the sshd daemon. I do this in situations where I have ssh enabled for internal users on port 22, but require external connectivity on say, port 2222.

How do I change my ports?

SOLUTION

1. Go to Windows Device manager > Multi-port serial adapters.
2. Select the adapter and right click to open the menu.
3. Click on the Properties link.
4. Open the Ports Configuration tab.
5. Click on the Port Setting button.
6. Select the Port Number and click OK.
7. Click OK to apply the changes.

How do I change my default port?

In this article

1. Start the registry editor. ...
2. Navigate to the following registry subkey: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp.
3. Find PortNumber.
4. Click Edit > Modify, and then click Decimal.
5. Type the new port number, and then click OK.

How do I SSH to a specific port?

Just use the option to the right of the address. Side note: if you're using the command line ssh client, you can specify the port as ssh -p <port> user@server . The port does not appear at the end of the address like it does in other URI schemes.

Can ssh listen on multiple ports?

1 Answer. Initially, the SSH service can be made to listen to multiple ports by adding the following line to /etc/ssh/sshd_config . In this scenario, you cannot define different rules for different ports.

What is SSH port number?

The standard TCP port for SSH is 22. SSH is generally used to access Unix-like operating systems, but it can also be used on Microsoft Windows. Windows 10 uses OpenSSH as its default SSH client and SSH server.

Is it worth to change SSH port?

Changing the port only stops automatic attacks against your SSH and some script kiddies. If someone was targeting you then they could fine the new SSH port. The advantage is that it stops failed login attempts in your logs.

What does changing SSH port do?

By default, SSH listens on port 22. Changing the default SSH port adds an extra layer of security to your server by reducing the risk of automated attacks. This tutorial explains how to change the default SSH port in Linux. We will also show you how to configure your firewall to allow access to the new SSH port.

Should I change default ports?

Recommended practice is to change the port numbers, but that'll only slow down an attacker. Most tools just scan all ports anyway, and once an open port is found, it's usually quite trivial to identify what service is running on it.