A machine implemented method, comprising: establishing a secure connection between a server and an intermediary registry server through a User Datagram Protocol, UDP, external port forming a single UDP channel, the server being in a peer group, the peer group based on a pre-shared key wherein each server (415, 425) in the peer group includes a cluster monitor and wherein one cluster monitor, independent of the intermediary registry server, administers configuration details of the peer group; sending, by a server in the peer group, a reporting message to the intermediary registry server using the UDP channel wherein the reporting message is associated with a UDP external endpoint instance of the server and a UDP internal endpoint instance of the server; responding, by the intermediary registry server through the UDP channel to the server, seeking confirmation of the UDP external endpoint instance of the server; responding, by the server, with confirmation of the UDP external endpoint instance of the server, and a cookie value logically associating redundant multiple secure connections with the server, the pre-shared key identifying the peer group, and registration data encrypted using the pre-shared key; receiving, by intermediary registry server, confirmation of the UDP external endpoint instance of the server; responsive to receiving confirmation from the server that the UPD external endpoint instance of the server is active, recording, by the intermediary registry server, a server identification, the UDP external endpoint instance of the server and the UDP internal endpoint instance of the server in an external address registry of the peer group; and sending by the intermediary registry server, an external address registry status message to the server in the peer group confirming listing of the UDP channel of the server in the external address registry of the peer group and a list of other servers registered by the intermediary registry server in the peer group enabling direct secure communication between the server and other registered servers in the peer group. establishing a secure connection between a server and an intermediary registry server through a User Datagram Protocol, UDP, external port forming a single UDP channel, the server being in a peer group, the peer group based on a pre-shared key wherein each server (415, 425) in the peer group includes a cluster monitor and wherein one cluster monitor, independent of the intermediary registry server, administers configuration details of the peer group; sending, by a server in the peer group, a reporting message to the intermediary registry server using the UDP channel wherein the reporting message is associated with a UDP external endpoint instance of the server and a UDP internal endpoint instance of the server; responding, by the intermediary registry server through the UDP channel to the server, seeking confirmation of the UDP external endpoint instance of the server; responding, by the server, with confirmation of the UDP external endpoint instance of the server, and a cookie value logically associating redundant multiple secure connections with the server, the pre-shared key identifying the peer group, and registration data encrypted using the pre-shared key; receiving, by intermediary registry server, confirmation of the UDP external endpoint instance of the server; responsive to receiving confirmation from the server that the UPD external endpoint instance of the server is active, recording, by the intermediary registry server, a server identification, the UDP external endpoint instance of the server and the UDP internal endpoint instance of the server in an external address registry of the peer group; and sending by the intermediary registry server, an external address registry status message to the server in the peer group confirming listing of the UDP channel of the server in the external address registry of the peer group and a list of other servers registered by the intermediary registry server in the peer group enabling direct secure communication between the server and other registered servers in the peer group.