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Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP)
OL-15498-01
Chapter 1 An Overview of the Cisco Unified IP Phone
Understanding Security Features for Cisco Unified IP Phones
Related Topics
• Understanding Security Profiles, page 1-10
• Identifying Encrypted and Authenticated Phone Calls, page 1-11
• Security Restrictions, page 1-11
• CAPF Interaction when the Phone Resets, page 1-12
Understanding Security Profiles
All Cisco Unified IP Phones that support Cisco Unified Communications Manager 7.0 use a security
profile, which defines whether the phone is nonsecure, authenticated, or encrypted. For information
about configuring the security profile and applying the profile to the phone, refer to Cisco Unified
Communications Manager Security Guide, Release 7.0.
To view the security mode that is set for the phone, look at the Security Mode setting in the Security
Configuration menu. For more information, see the
“Network Configuration Menu” section on page 4-4.
Media encryption Uses SRTP to ensure that the media streams between supported devices proves secure and
that only the intended device receives and reads the data. Includes creating a media master
key pair for the devices, delivering the keys to the devices, and securing the delivery of the
keys while the keys are in transport.
Signaling Encryption Ensures that all SCCP signaling messages that are sent between the device and the Cisco
Unified Communications Manager server are encrypted.
CAPF (Certificate Authority
Proxy Function)
Implements parts of the certificate generation procedure that are too processing-intensive
for the phone, and it interacts with the phone for key generation and certificate installation.
The CAPF can be configured to request certificates from customer-specified certificate
authorities on behalf of the phone, or it can be configured to generate certificates locally.
Security profiles Defines whether the phone is nonsecure, authenticated, or
encrypted.
Optional disabling of the web
server functionality for a phone
You can prevent access to a phone’s web page, which displays a variety of operational
statistics for the phone.
Phone hardening Additional security options, which you control from Cisco Unified Communications
Manager Administration:
• Disabling PC port
• Disabling Gratuitous ARP (GARP)
• Disabling PC Voice VLAN access
• Disabling access to the Setting menus, or providing restricted access that allows access
to the User Preferences menu and saving volume changes only
• Disabling access to web pages for a phone.
Note You can view current settings for the PC Port Disabled, GARP Enabled, and Voice
VLAN enabled options by looking at the phone’s Network Configuration menu.
For more information, see the
“Displaying the Network Configuration Menu”
section on page 4-1.
Table 1-3 Overview of Security Features (continued)
Feature Description