From the course: Complete Guide to Linux Security: Protecting Your Linux Server Environment

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Configuring UFW

Configuring UFW

- Let's go ahead and continue with our lab that we're working on in ufw. This is lab 22, and we're going to start with the heading, create inbound rules. Once again, I'm working on an Ubuntu system, so let's go to Ubuntu now. And here we are. So first, the problem is nobody can connect to the server. The firewall is working so well that no one can do any connections to it. Chances are you're going to want to be able to connect to it in some manner. And let's give ssh as the example. Let's say that my client's system needs to ssh into the server. Maybe to do some work with files, or databases, or who knows what. To do that, we need to allow ssh on the firewall. To do that, we need to set up a rule. And the rules are really easy with ufw. We're going to type ufw allow, and you could just do ssh, you could do it by the service name if you want to, or we could do it by port number. And so if we do 22/tcp, that would be the equivalent, or you could pick another port number if you're…

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