Abstract: To solve the problem of the mutual authentication between client and server in the TNC network access layer and terminal and to carry on the task to measure the integrity of client platform, the structure of EAP-TTLS protocol and IF-T standard requirements of the TNC network access layer are analyzed in-depthly, and the security and reliability of trusted network based on EAP-TTLS is focused on. This paper uses the open-source framework, TNC @ FHH, to implement the trusted network access and authentication based on EAP-TTLS. At last, Wireshark capture tool is used to catch the packet from the authentication process, and the results are analyzed.

Key words: Wireshark capture tool, EAP-TTLS protocol, network access layer, mutual authentication