In my earlier posts I covered network services. The purpose of those services is to provide a function over a network connection. More often than not the internet connection of a network service host can change. In order for a client to access these network services, it needs to know where the host is. To remedy this problem, a “call home” service is used to register the host so the client can find it. This service is referred to as…
You should consider security anytime you run processes that provide some kind of service over a network. For instance, if you have a website, that service is providing web pages to clients that make a request for it. The service does not pick and choose who gets what content. Instead, it hands that off to lower layer functions. What if a client makes a request that the process doesn’t have instructions on how to handle. Furthermore, what if that client…
In the last post I covered how SSH key pairs can be used as a form of two factor authentication, commonly known as 2FA. In this post I’ll be covering SSH as a means to establish secure communications between systems. Using SSH will provide a way to run commands on remote hosts, whether they be on node on a local network or accross the globe. The key pair security is a way to set the remote host to only allow…