Method for routing bi-directional connections in a telecommunication network by means of a signalling protocol via an interposed firewall with address transformation device and also a telecommunication network and security and tunnel device for this

摘要

The invention relates to a method for routing a bi-directional end-to-end connection between an end subscriber and the domain of a service provider by means of a signalling protocol via an interposed firewall with address transformation device, wherein by means of a security and tunnel device, located in the end-to-end connection between the end subscriber and the firewall with address transformation device in the domain of the end subscriber, and a session border controller, located in the end-to-end connection in the domain of the service provider, a tunnel is set up between the security and tunnel device and the session border controller and a bi-directional data exchange takes place via the tunnel between the end subscriber and the domain of the service provider in the area between the security and tunnel device and the session border controller by means of a tunnel protocol, and also a telecommunication network and a security and tunnel device for this.