Cisco 8851, Administration Manual

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C H A P T E R
9
Cisco IP Phone Security
• Security Features, page 121
• Documentation, Support, and Security Guidelines, page 124
Security Features
Security features ensure that calls are secure and authenticated.
Domain and Internet Setting
Configure Restricted Access Domains
If you enter domains, the Cisco IP Phone responds only to SIP messages only from the identified servers.
Procedure
Step 1
In the phone web user interface, navigate to Admin Login > advanced > Voice > System .
Step 2 In the System Configuration section, in the Restricted Access Domains field, enter fully qualified domain
names (FQDNs) for each SIP server that you want the phone to respond to. Separate FQDNs with commas.
Example:
voiceip.com, voiceip1.com
Step 3 Click Submit All Changes .
Configure the Internet Connection Type
You can set the connection type to one of the following:
• Dynamic Host Configuration Protocol (DHCP) — Enables the phone to receive an IP address from the
network DHCP server. The Cisco IP phone typically operates in a network where a DHCP server assigns
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
121