Straub Stephen T.`Straub Ronald P.`Straub Michael P.
摘要：
Methods and apparatuses, including computer program products, are described for determining expiration time of bindings for NAT devices. A first device receives a first request including a first source IP address/port pair of a first NAT binding, and transmits a response. The first device receives a second request including a second source IP address/port pair of a second NAT binding, and transmits a response. The first device sets a refresh time T1 of the first NAT binding to be shorter than an expected minimum expiration time of the first NAT binding, transmits one or more messages via the second NAT binding where a sending interval time T2 of the second NAT binding is longer than T1, increments T2 when a response is received, and if a response to any of the messages is not received, sets T1 equal to the last T2 value for which a response was received.
