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 3 HP LaserJet and Color LaserJet MFP Security Checklist 11
Note:
Be sure to select only the authentication features that you plan to
configure for the MFPs selected. Many of the options available (such as
LDAP, Kerberos, and Digital Send Service) require additional solutions
on the network for support.
For more information on Access Control configuration, please refer to the user or
administration guide for your device. For more information on Access Control Solutions,
please refer to the Access Control Printing Solutions Overview located here:
http://h20195.www2.hp.com/V2/GetPDF.aspx/4AA3-0255ENUC.pdf
Access Control List (ACL)
The ACL limits network access to the MFPs to only the IP addresses or subnets that you specify. This
includes printing and all other access. Thus, to access the device an administrator must use a
computer that is on the list, have the correct Web Jetadmin password, and then have the correct
SNMPv3 credentials to manage the MFPs. You may also wish to secure your device by using
IPSec/Firewall rules to limit specific traffic.
Note:
Keep in mind that the ACL is not configured until at least one computer
is in the list. When configured, no computer outside the list will have
access to the MFP including printing.
Follow these steps to configure the ACL:
On the Config tab click Access Control List (Figure 4) under the Security Category.
Figure 4: The Access Control List Settings under the Security Category.
Add an IP address or a net mask by filling in the IP Address or Mask fields.