Open the SSH configuration file /etc/ssh/sshd_config with your text editor: sudo vim /etc/ssh/sshd_configįor the line starting with Port 22. If you are using iptables as your firewall, to open the new port, run: sudo iptables -A INPUT -p tcp -dport 5522 -m conntrack -ctstate NEW,ESTABLISHED -j ACCEPT 3. You can add or edit identity files, port forwardings (with graphical preview) and any other ssh config option. To open the new port run: sudo firewall-cmd -permanent -zone=public -add-port=5522/tcp sudo firewall-cmd -reloadĬentOS users also need to adjust the SELinux rules: sudo semanage port -a -t ssh_port_t -p tcp 5522 Handy tool for manage your OpenSSH ssh client configuration file. In CentOS, the default firewall management tool is FirewallD. If you are using UFW, the default firewall configuration tool for Ubuntu, run the following command to open the new SSH port: sudo ufw allow 5522/tcp Adjusting Firewall #īefore changing the SSH port, you’ll need to adjust your firewall to allow traffic on the new SSH port. In this example will change the SSH port to 5522, you can choose any port you want. Although you can use a port within a 1-1024 range for the SSH service to avoid issues with port allocation in the future, it is recommended to choose a port above 1024. In Linux, port numbers below 1024 are reserved for well-known services and can only be bound to by root.
Ssh config editor how to#
The following sections explain how to change the SSH Port on a Linux system. All you need to do is to edit the SSH configuration file and restart the service. The best way to protect your server from attacks is to configure your firewall to allow access to port 22 only from trusted hosts and set up an SSH key-based authenticationĬhanging the SSH port of an image is a simple task.
0 kommentar(er)
