oidentd is a project by Janik Rabe. Downloads and more information are available from the project page. View project

Dropping Privileges

It is highly recommended not to run internet-facing services as root. For this reason, oidentd attempts to switch to an unprivileged user automatically after starting up.

Please note that oidentd needs to run as root on a small number of systems. On these systems, a warning is printed at startup and privileges are not dropped automatically. Your system is affected by this limitation if oidentd --version prints "Needs root access: Yes".

Default User

By default, oidentd attempts to run as one of the following users, in order of preference. If a user does not exist, oidentd tries to use the next one.

  • oidentd
  • nobody

If neither of the above users exists, oidentd switches to user ID 65534.

Default Group

By default, oidentd attempts to run as one of the following groups, in order of preference. If a group does not exist, oidentd tries to use the next one.

  • oidentd
  • nobody
  • nogroup

If none of the above groups exist, oidentd switches to group ID 65534.

Changing This Behavior

The --user and --group options can be used to run oidentd as another user or group. oidentd refuses to start up if the user or group specified by either of these options does not exist, or if privileges cannot be dropped for some other reason.