Multi-Threaded Intrusion Detection System (MIDS) for IPv6 NetworksSummary: IPv6 is designed as a next-generation Internet protocol. It is planned to gradually replace the IPv4 protocol currently used in the coming years. IPv6 offers many features and futures over IPv4. Security is a key future supported by IPv6 and is a mandatory option in IPv6 networks. Security is not mature in IPv6 compared to IPv4. With the innovation of new capabilities and applications, additional security measures are required for the next generation operational network for end-to-end communications. In this article, we will detail the main threats associated with IPv6 and its possible solution. Intrusion detection system is one of the available solutions, although it is widely used in IPv4 networks, but there is no working solution for IPv6. In this paper, we proposed an intrusion detection system (IDS) based on a multi-threaded technique. The proposed model is a software-based design and can be used effectively and efficiently for IPv6 networks as well as IPv4 networks during the transition period. Keywords: IDS, IPS, NAT, FirewallsI. INTRODUCTIONIPv4 has been used since the 1980s. It forms the basis of communication on the Internet. IPv4 effectively meets the communication and application needs and requirements of the times. Due to the innovation of new market trends, ideas and new applications, the growth of the Internet has increased significantly. It must support demanding new services. To eliminate this problem, IPv4 would have to be replaced. A new protocol named IPv6 has been introduced for future needs and end-to-end communication. IPv6 is considered a next generation protocol. A 128-bit address space is used to overcome the address degradation problem. Hie...... middle of paper ......tion System based on Multi SoftMan, IEEE, 2009.[6] Hui Huang, Jian Ma “IPv6 Furture Appoval Networking” IEEE, 2000[7] Jivika Govil, Jivesh Govil, Navkeerat kaur, Harkeerat Kaur “A review of IPv4 and IPv6 networks: constraints and various transition mechanisms” IEEE, 2008.[8 ] Yuk Nam Law, Man Chiu Lai, Wee Lum Tan and Wing Cheong Lau “Empirical Performance of IPv6 vs IPv4 under a dual stack environment” IEEE, 2008[9] Yue Chengqing, Wang Yinglong and Wang Jizhi “A IPv6 Network Performance Test System using Multi-Agent” IEEE, 2007[10] Diel G. Waddington, Gangzhe Chang “Making the Transition to IPv6” IEEE, 2002[11] Carlos E. Caicedo and Jamed BD Joshi, “IPv6 Security Challenges” IEEE, 2009[12] Rob Goode “Next Generation Internet Protocol: Testbed Experience” NATO C3 Agency, IEEE 1998[13] www.ipv6.org[14] www.ist-ipv6.org