QNAP Security NVR-101 (Version: 2.8.0) - Manual (Page 50)

5.2 System Settings
You can configure basic system settings including server name, date & time, and
view the system settings.
5.2.1 Server Name
Enter the name of NVR. The server name can be 14 characters long at maximum,
which supports alphabets, numbers, and hyphen (-). The server does not accept
names with space or names in pure number. The following characters are not
supported.
. ; : " < > * + = \ | ? , [ ] /
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