Printronix P5000LJ Series - Manual (Page 259)

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Extra Features
NIC Security
There are TCP access lists available to restrict host connections with the
device.
Users And Passwords
By default, the NIC supports two logical user types:
root Access to everything within the print server including all
configurable settings.
guest Ability to list settings only.
Using set commands, other users can be created.
Passwords can be set for each user type. However, most often you would just
set a password for the root user to protect the NIC configuration. Guest users
cannot alter the print server configuration in any way.
You can configure a root password on your NIC using either Telnet or a Web
browser as follows:
Telnet
Using Telnet, set a root password by entering the following commands.
Syntax:
set user passwd username password
save
Example:
set user passwd root your_password_for_root
save
Note If prompted for a User ID and password first, type in root for the user ID
and press ENTER at the password prompt since there is no password by
default.