Abstract: The paper presents an independent host access control method to realize packet encryption and decryption based on firewall. It realizes personal firewall function using NDIS filter driver technology, and it is easy to realize the access control in high performance or simple network environment. The access control method has good universality, high safety, strong controllability and good scalability characteristics, and its purpose is to prevent illegal (unauthorized) host access security network, reduce the packet loss, and improve the system of transfer rate when the host access network. The experimental results show that this method contributes to improve the stability of system and reduce the illegal access during the encryption and decryption process.
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Key words: encryption technology, access control, packet filtering, automatic switchover, network driver interface specification, data packet recognition