The Internet Engineering Task Force (IETF) introduced IPv6 in the early 1990s as a solution to the exhaustion of the address space provided by IPv4. The Global Internet Assigned Numbers Authority (IANA) distributed the last block of IPv4 addresses in February 2011, making the need to move to IPv6 urgent. Today the question “why implement IPv6?” was reworded to "how to implement IPv6?" (Vaughan-Nichols, 2012). As more and more organizations adopt IPv6 for their networking, it is now clear that IPv6 is not only a solution to the limited address space provided by IPv4, but also a path to innovation. But despite all the advantages that IPv6 offers over IPv4, it also has some disadvantages. This document focuses on the security issues involved with IPv6. The document discusses some improvements in the security features of IPv6 compared to IPv4, the new security threats faced by IPv6, and some solutions to improve the security of IPv6. INTRODUCTION Internet Protocol version four (IPv4) was introduced by the International Engineering Task Force (IETF) in 1981 via RFC 791 as a viable solution for connecting computers for communication. With a 32-bit address space covering 2^32 addresses, it was considered sufficient to provide an IP address to every user in the world. But with the need for IP for various technologies such as sensor networks, radio frequency identifiers (RFID), mobile phones, household appliances and automobiles, have led to the exhaustion of IPv4 address space (Marsan, 2011) and the emergence of IPv6 in 1995. via RFC 1885 and later RFC 2460 in 1998. IPv6 offers some advantages over IPv4, such as a larger address space, better routing table manageability, automatically configuring addresses, and better security features than IPv4 ( C...... half of the document ...... al., 2009).4. Dual Stack and Tunneling: Dual stack is the preferred mechanism for transitioning from IPv4 to IPv6, providing an organization that can support both IPv6 and IPv4 applications. Furthermore, if tunneling is implemented, it is advantageous to use static tunneling over dynamic tunneling as it gives the administrator more control over the transition mechanism (Ashford, 2012). CONCLUSION This document has recognized the improvements in IPv6 over IPv4, from a security perspective. point of view. The new security threats faced by IPv6 and some measures that can be taken to improve the security of IPv6 were also discussed. While IPv6 offers security improvements over IPv4, it does not resolve all security threats faced by IPv4. With the rapid emergence of IPv6, there is a need to introduce better security mechanisms that can protect IPv6 networks from security attacks.