Aaron's Worthless Words

Sign in Subscribe

security

Some stuff about securing your network and servers

Port Knocking

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 detects the sequence of packets that you send and runs a script

Fallback IPtables

The hardest part of messing with firewall configs is knowing what is going to lock you out of the firewall itself. It doesn’t to me very often, but I’ve been doing firewalls for 10 years now. I was thinking about my own IPtables implementation at home and realized

Using an Old Server as a Home Firewall

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 anyone want to do this, though? If

The Principle of Least Privilege

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 any number of things, but it is a very important topic when talking about