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In Linux, and other UNIX-like systems, you have to be root (have superuser privileges) in order to listen to TCP or UDP ports below 1024 (the well-known ports).
This port 1024 limit is a security measure. But it is based on an obsolete security model and today it only gives a false sense of security and contributes to security holes. Therefore, it should be removed. As soon as possible.
Today the typical Linux machine is not used in a way which makes the port 1024 limit relevant. We tend to use it as a desktop client (workstation) with only one user which has superuser access via sudo.
Which distros other than the Ubuntu family follow this model? Might be popular, but typical?