Which Linux process is using a particular network port?

Most network related services have to open up a network socket, so they can start listening for incoming network requests. It is common to find the TCP or UDP being used as the main communication protocol. In this article, we will check what ports are used by which Linux process. Auditing processes and network services Find out what process is listening to a port Only one process can actively listen to a TCP or UDP port. We usually only discover […]

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Budgeting for Techies: How to Get Money for a New Security Tool

Budgeting for techies How to Get Money for a New Security Tool We all know the common answer when asking for a new software tool: “sorry, no budget”. But why is that? Often because we, as technical oriented people, simply don’t know how budgeting works. Not surprising, as no one taught us. The downside is that it limits us seriously, to obtain the right tools for the job. Time to combine tech, money, and skills, to get finally that new […]

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Viewing available test categories in Lynis

Test categories in Lynis When auditing a server, it may be useful to only run a particular category of tests, like firewall related tests. In that case the –tests-category parameter can be used, together with the category name. Available categories To determine what categories are available, Lynis has a built-in parameter –view-categories which lists all available files. Most of the names are self-explanatory on what of tests they include. For more information about the included tests, have a look in […]

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