Implementation of Securing IPv6 Intranet Address Based on the Optimal Design Solution of Router

New router design solution optimized to use the IPv6 RA protocol packets is raised to meet the demand of the security of IPv6 intranet without weakening the end-to-end security of IPv6. Source addresses of nodes in IPv6 intranet change dynamically. That helps to hide the nodes addresses and protect the nodes against attack from extranet. No any additional modification is needed on the intranet nodes. Flexibility of administration and security of intranet is improved with this solution.