OUT-OF-BAND KEEP-ALIVE MECHANISM FOR CLIENTS ASSOCIATED WITH NETWORK ADDRESS TRANSLATION SYSTEMS

摘要

without applying an additional condition on the underlying native application (s), can be applied to applications connected externally in the architecture is provided for NAT (network address translation) to maintain the connection state of the connection device by using OOB (out-of-band) technology. OOB solution without requiring modifications to the application protocol can be applied to any connection, is used in TCP and UDP. Keep-alive (KA) application is used as the OOB mechanism to inject a packet that appears to be coming from the native KA connected to the NAT device. This packet is injected only deceive the NAT device to reset the timer for the disabled access, does not deceive the native application can not detect spoof miss the chaos. Thus, the connection is not terminated, due to NAT timeout, Thus, for example, a client / server protocol, it is not necessary to create a fake activity packet for the maintenance connection.