“So you’ve taken the time to set up a firewall (you have set up
a firewall haven’t you?). Regardless of what firewall software
you’re using, you have to ask, “Now what?”
“As I explained in my previous article, Securing Your Home
Network With the Edge Firewall , a firewall is the first line of
defense for a home network — not the entire defense. Now you have
to go through each computer on your network rigorously looking for
problems and locking down everything as tight as you can. This is
especially true for any server machines you may have
running.“
“For this article, I’m going to focus a bit on how the
underlying operating system plays a role in security. I’ll also
talk about a couple common problems in most default Linux installs
and what to do about them. Finally, I’ll talk about connectivity
and access control and how it affects all your systems, not just
your servers.”