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FreeRADIUS Beginner's Guide by Dirk van der Walt

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Time for action – incorporating Linux system users in FreeRADIUS

The FreeRADIUS documentation recommends that it runs as a non-privileged user. When we include the system users as a user store, this non-privileged user will need access to the /etc/shadow, file. Each of the three distributions has different default configurations with regards to the permissions and ownership of the /etc/shadow file.

Preparing rights

Ubuntu has the correct rights for the /etc/shadow file by default. In Ubuntu the /etc/shadow file is owned by the group called shadow which has read rights to the file. When FreeRADIUS installs, it adds a user and group called freerad. The user freerad is added to the shadow group, which allows freerad read access to /etc/shadow.

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