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Advanced Operational Features
41-001343-02 REV04 – 05.2014 6-15
Whitelist Proxy
To protect your IP phone network, you can configure a “Whitelist Proxy” feature that screens incoming call requests
received by the IP phones. When this feature is enabled, an IP phone accepts call requests from a trusted proxy server only.
The IP phone rejects any call requests from an untrusted proxy server.
The whitelist is dynamically updated (i.e. the phones are able to refresh and resync the whitelist [without a reboot] if the IP
addresses corresponding to the proxy FQDNs are changed on the DNS server).
The IP phone monitors the following events and an update is triggered if required:
• 200 OK responses to REGISTER requests if the peer’s IP address is not currently in the whitelist.
• 200 OK responses to INVITE requests if the peer’s IP address is not currently in the whitelist.
• INVITE requests from untrusted proxy servers.
Configuring Whitelist Proxy Using the Configuration Files
You use the following parameter to configure the whitelist proxy feature using the configuration files:
• sip whitelist
Note:
An update will not be triggered for the following events:
• 200 OK responses to INVITE requests for an IP call.
• When more than one INVITE requests are received from the same untrusted proxy server.
Configuration Files
For the specific parameters you can set in the configuration files for setting Whitelist Proxy, see Appendix A, the section, “Whitelist Proxy Setting” on
pageA-207.