DHCP client server system, DHCP client device and DHCP server device

摘要

With former DHCP certification system it could not correspond to the DHCP sequence of 1 phase 2 messages due to Rapid-Commit option. In addition, with former DHCP certification system, retransmission attack is possible with timing of lease renewal, not be able to detect the when the information which between the client and the server is used with retransmission detection system becomes unable to take same period, there was a problem that unnecessary traffic continues to come out. Inside DHCP client device, user identification, secret key, retransmission detection system (RDM) feelingIt has the expedient which remembers information. As for the DHCP server device user identification as a key the secret key and RDM information inspectionIt has cord possible DB inside, or outside it has the same function it has the access mechanism to DB.