Cisco CP-7961G Administration Guide - Page 28

Understanding Security Features for Cisco Unified IP Phones Chapter 1 An Overview of the Cisco Unified IP Phone Table 1-4 Overview of Security Features (continued) Feature Description 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 and SIP 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 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, encrypted, or protected. See Understanding Security Profiles, page 1-15 for more information. Encrypted configuration files Lets you ensure the privacy of phone configuration files. Optional disabling of the You can prevent access to a phone's web page, which displays a variety of operational statistics web server functionality for for the phone. a 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 Security Configuration menu. For more information, see Device Configuration Menu, page 4-17. 802.1X Authentication The Cisco Unified IP Phone can use 802.1X authentication to request and gain access to the network. See Supporting 802.1X Authentication on Cisco Unified IP Phones, page 1-18 for more information. Related Topics • Understanding Security Profiles, page 1-15 • Identifying Authenticated, Encrypted, and Protected Phone Calls, page 1-15 • Security Restrictions, page 1-20 • Device Configuration Menu, page 4-17 1-14 Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP) OL-21011-01