... bubble to the address and port in the origin data (the relay). 5. The encapsulated bubble is received by the NAT and forwarded to the relay. The NAT now sees the relay as a recent peer and allows ... a peer. The Teredo client sends an ICMPv6 ping to the peer via the client’s server, and the peer responds back through the closest relay. The server decapsulates the request and sends the ping ... pre-existing network- based security controls (forexample, firewalls and IPSs) on the client’s network do not see through the tunnel to apply the controls to the traffic being tunneled. One could therefore...