HP Scanjet Enterprise 7000n , HP Color LaserJet CP5525, HP Color LaserJet CM4540 MFP and HP LaserJet M4555 MFP - HP Imaging and Printing Security Best Practices

Chapter 4 HP LaserJet and Color LaserJet MFP Security Checklist 46
Figure 45: The Open/Print from USB option.
PJL Password
The PJL password protects the default features on the MFP that can be changed by sending PJL
commands to the MFP. The PJL password is required for administrative PJL commands that are used
to modify feature settings. If you do not set this password you are vulnerable to having your device
settings including your control panel display altered. To set the PJL Password:
Click PJL Password under the Security category (Figure 46).
Figure 46: The PJL Password option.
Type a password that is any number between 1 and 2147483647 that is at least nine
digits in length, and repeat it in the Repeat PJL Password field. Do not use the same
PJL password for all of your print devices as this can significantly increase the risk of
having your PJL password guessed by an attacker.
Note:
If you have problems configuring this password try configuring it through
the EWS.