SIP NAT Function Cookies

Cookies are inserted to hide that information is coming from a realm external to the home realm. They are used when information needs to be placed into a given element of a SIP message that must also be seen in subsequent SIP messages within a flow. When forwarding a SIP message, the Oracle® Enterprise Session Border Controller (E-SBC) encodes various information in the outgoing message, which is passed from one side to another in SIP transactions.

SIP NAT function cookies let the E-SBC hide headers, IPv4 addresses, and SIP URIs. These cookies are included when certain conditions are present in E-SBC SIP transactions.

Oracle’s SIP NAT function cookies can be used in the userinfo, host, URL parameter, and tel URL parameter portions of the SIP message.