Port Knocking
·2 min read
A few months ago, a friend of mine told me about the concept of port knocking, where you send packets to a server on certain ports to authenticate access to the box. A daemon running on your server …
Linux
The Principle of Least Privilege
·1 min read
The Principle of Least Privilege says that users or applications should only have access to the what it needs to access and that access should be as limited as possible. This idea can be applied to …
Using an Old Server as a Home Firewall
·3 min read
You can use an old PC as a firewall at home (and at work, I guess). It’s not that hard to do if you have a basic knowledge of Linux, DHCP, and IPtables, but that may be saying a lot. Why would …