Support for TCP port forwarding

TCP port forwarding enables a BNG to mediate communication between its connected access nodes and service provider back-office systems, such as external management and provisioning systems, leveraging NETCONF XML management protocol, and TACACS+ servers. The BNG and its downstream access nodes are presented to back-office systems as a single addressable network element. Communication requests to and from access nodes are redirected from one address and port number combination to another while packets traverse the MX series router. You configure unique combinations of listening ports and addresses on the BNG. TCP connections are triggered by traffic arriving on the listening port and address pairs from acceptable prefixes.