At times, a user comes across an invalid, reserved, or misconfigured username. This document will demonstrate the cPanel and WHM’s username restrictions and will also help in showing the ways to deal with it.
While a user tries to create or modify a cPanel or WHM username, there will be some rules which he needs to follow:
There are certain special rules regarding Username:
There are certain list of Usernames that the cPanel and WHM have reserved for the system to use, but they are not for cPanel or WHM accounts. The list, however can grow over time, and new versions of cPanel & WHM may get added as a part of this list.
These following files are analysed by cPanel and WHM regarding the reserving or restricting of a Username or alias:
The system reserves certain aliases like abuse, adm, mysql, sync, webalizer, named, netdump, news, nfsnobody, nobody, noc, nscd, ntp, nut, operator, pcap, postfix, postgres, xfs, rpc, and many more for the Username root, info , mailer-daemon, marketing , sales , support, for the Username postmaster, newsadm , newsadmin , usenet, for the Username news, ftp-adm, ftp-admin, ftpadm, ftpadmin, for the Username ftp, and www for the Username webmaster.
All information on cPanel and WHM’s Username restrictions is outlined in this review.