Wildfire-traversal of network address translation routers to provide end-to-end connectivity to firewalled hosts.

摘要

With the dwindling pool of unallocated IPv4 addresses and the greatly delayed IPv6 implementation, NAT routers have become the most popular solution deployed to help conserve the addresses available in the IPv4 address space. The prevalence of this solution has resulted in hosts running behind a NAT router lacking end-to-end connectivity. While a number of solutions exist to allow incoming connections for these hosts, all of these solutions face significant down-sides in their approaches to reestablish a semblance of end-to-end connectivity when communicating through NAT routers and their firewalls. Much like how wildfires in nature are able to get around firewalls set prevent the spread of fires, Wildfire is an attempt demonstrate how it is possible to establish connections between hosts running behind NAT routers by extrapolating how the NAT routers map the connections to their internal routing tables and connecting through a reliable transport protocol built on UDP.