Bidirectional FSL3/4 on NEDIA (Flow Separation by Layer 3/4 on Network Environment Using Dual IP Addresses)

A home network may have various equipment such as home appliances, PCs and other small electronic devices. Current trend is to make these devices have Internet connectivity. NAT (Network Address Translation) is a short-term solution of IP depletion problem and is widely used to construct home networks. Most of the existing NAT techniques support only unidirectional communication, i.e., connections from a local network to the public network. Though AVES (Address Virtualization Enabling Service) technique provides a bidirectional communication service to the NAT network, it is restrictive in a sense that it requires application level gateways which not only degrades performance but also is vulnerable in security. In this paper, we propose FSL3/4 aware DNS server for supporting bidirectional communication between NEDIA and external network. We also analyze the proposed method by comparing it with other methods which support bidirectional communication.