Method and devices for creating bidirectional connections through a firewall with an address conversion device

摘要

A tunnel (TV) is set up between a security-cum-tunnel device (STG) and a session border controller (SBC) via the STG in an end-to-end connection between an end subscriber (TP,PC) and a firewall with an address transformation device (FW/NAPT) in the domain of an end subscriber (DE) and via the session border controller in an end-to-end connection in the domain of a service provider (DD). Independent claims are also included for the following: (A) A telecommunications network for carrying out a method for managing an end-to-end connection between an end subscriber and the domain of a service provider by means of a session initiation protocol via an interposed firewall with an address transformation device; (B) and for a security-cum-tunnel device for carrying out a method for managing an end-to-end connection between an end subscriber and the domain of a service provider by means of a session initiation protocol via an interposed firewall with an address transformation device.