Here’s how to use TCP wrappers to restrict SSH access: TCP wrappers are an access control mechanism that uses rules in the /etc/hosts.allow and /etc/ny files to allow or deny access to network services. Now, only the specified user(s) will be able to access the server via SSH from the specified IP address(es).Īnother method to restrict SSH access by IP address is to use TCP wrappers. Then restart the SSH service: systemctl restart sshd You can add multiple IP addresses separated by spaces. Open the sshd_config file in a text editor: vi /etc/ssh/sshd_configįind the line that reads #PermitRootLogin yes and add the following line below it: AllowUsers username with the username of the user you want to allow access and ip_address with the IP address of the computer you want to allow access from. One of the easiest ways to restrict SSH access by IP address is to modify the sshd_config file, which controls SSH server settings. By following these tips and taking a proactive approach to server security, you can reduce the risk of security breaches and ensure the continued operation of your systems. In this blog post, we’ll discuss methods to restrict SSH access to your Linux server by IP address and then also some SSH hardening that you should already have in place but still worth mentioning in case you do not.Īs the number of cyber attacks continues to rise, it’s crucial to prioritize server security and implement best practices for server management.
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