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Netstat is an extremely useful Linux command line tool that allows you to check which service is connecting to a port on your machine. It is very useful to analyze what’s going on on your machine when you are facing or trying to to prevent an attack on it. You can find information such as how many connection are being made on a port, which IP addresses these connections originate from, and much more. Netstat ships with most distributions of Linux so it should already be installed on yours.

Launch a shell terminal on your machine and run the following command:

# netstat -ant

Managing user access to a Linux Intranet server is extremely easy and quick. Yet, I find some new administrators get frustrated by the lack of complete information. In some HOWTO guides, details regarding .htaccess are given, without mentioning that the Apache must be configured. My hope is that this brief article gives a complete look at managing access with the use of Apache overrides and .htaccess. Since the goal is to make it as easy as pie, I will cut the techno talk and get to the point.

First, although this article applies to just about any Apache/Linux web server, it is most beneficial in the context of Intranet servers or when a website needs to control or secure certain web pages within directories for a set of specific users.