![]() ![]() ![]() But keep in mind that SSH is the primary gateway into your server, so it will be the prime target of malicious actors. Of course you’ll want to take other standard security measures: use a proxy service to hide your IP, use a firewall, keep your system and software updated with the latest security patches, and frequently check your logs and running processes for suspicious activity. From the outside, it will appear as if the machine provides no remote login. That way if a threat actor is trying to infiltrate your web server, SSH won’t even be available to them to attack. It’s especially useful if you get a separate IP address for your host OS and your web server jail. You will then be forced to enter the host OS from SSH and then you can enter the web server. For example, if you run a web server, put it in a jail without SSH enabled. If you are running a public server, my recommendation is to jail all your services and turn off ssh in all of your jails. Especially with a public server, if you do not take these basic precautions, you will constantly be hammered by bots. However, I would recommend making a habit out of setting up SSH securely using keys and using non-standard ports. By default, SSH uses a password based authentication. When using SSH for a home network, such as to access a Raspberry Pi or home media server, you might be incline to brush aside security. In the coming steps you’ll see how this works.īecause SSH can be used to access a machine remotely, it will be a primary target of bots and other malicious actors trying to compromise your system. When it is matched with the appropriate private key (upon a login attempt), the client is given access to the server. A client will share its public key with a server, and then the server will store that public key. I won’t get too far into the cryptography weeds (I’d be incapable of doing so, anyway), but it’s important to know that you share your public key with other systems while your private key remains on your device. Keys work in pairs, with a public key and a private key. On macOS is this found in /Users / USER/.ssh/. In /home/ USER/.ssh/ (where USER = applicable system user), you will usually find the SSH keys we need to create/store for the client. In /etc/ssh you will see your SSH files we’ll need to configure for the server. Type this into the command line, where and are replaced by the appropriate values (no brackets). The typical ssh syntax to connect to a server is ssh address]. For example, I use SSH when administering the FreeBSD server that runs this website or when doing things with my home Raspberry Pi server. Usually this is used for servers because they are often remote or not connected to a monitor. SSH stands for “secure shell.” Using SSH on FreeBSD allows you to use the command line to log into another system using the command line. ![]()
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