# User permissions --real-user

## User permissions --real-user

The Node will refuse to run unless it can relinquish root privileges once it has opened its ports. Long-running root-privileged servers with network access are a serious security risk.

**If you are running on Linux or using a Docker container that doesn’t have a non-root user, that’s a problem.**

If it does have a non-root user, specify that user’s uid, gid, and home directory to masq:

`masq setup —real-user 1000:1000:/home/username`