Allow Calls Only with Specific SIP User-Agent Header Value

The SIP User-Agent header contains information about the User Agent Client (UAC) initiating the SIP dialog request. This information is unique to the Enterprise and therefore, it's recommended to configure the device so that it accepts only calls with a specific User-Agent header value.

➢ To configure security based on SIP User-Agent header:
1. Open the Message Conditions table (Setup menu > Signaling & Media tab > Message Manipulation folder > Message Conditions), and then add a rule that specifies a value for the User-Agent header.

The following figure shows a rule where the SIP User-Agent header value is "abc.com":

Message Condition Rule for SIP User-Agent Header

message_con_useragent

2. Open the Classification table (Setup menu > Signaling & Media tab > SBC folder > Classification), and then assign the Message Condition rule to the relevant Classification rule.