Securing a server by restricting access is a critical measure that should never be omitted while setting up a server. Using TCP Wrappers, we can allow only those networks to have access to our server's services that we have been configured and support TCP Wrappers.
For demonstrating the following steps, we are using two systems that are on the same network and can ping to each other successfully. One system will be used as a server and the other will be used as a client.
Linux provides several tools for controlling access to the network services. TCP Wrappers is one among those and adds an additional layer of protection. In the following steps, we will see how to configure TCP Wrappers to define the access for the different hosts:
- First, we need to check whether a program supports TCP Wrappers or not. To do so, first, find the path of the program executable by using the
which
command:
which sshd
Here, we have used the SSH
program...