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Saroj Patil Nadine Sundquist CS526-S2008 University of Colorado, Colorado Springs Dr. C. Edward Chow

IPv6: A Closer Look at Tunneling, Security, and Ubuntu. Saroj Patil Nadine Sundquist CS526-S2008 University of Colorado, Colorado Springs Dr. C. Edward Chow. Roadmap. IPv6 (Internet Protocol Version 6) Basics Tunneling IPv6 Security Examples Ubuntu Test Network Future Work

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Saroj Patil Nadine Sundquist CS526-S2008 University of Colorado, Colorado Springs Dr. C. Edward Chow

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  1. IPv6: A Closer Look at Tunneling, Security, and Ubuntu Saroj Patil Nadine Sundquist CS526-S2008 University of Colorado, Colorado Springs Dr. C. Edward Chow

  2. Roadmap • IPv6 (Internet Protocol Version 6) Basics • Tunneling • IPv6 Security Examples • Ubuntu Test Network • Future Work • What’s our motivation? • IPv6 will define networking and the continuation of last semester’s project in IPv6.

  3. IPv6 Overview • IPv6 (Internet Protocol version 6) is a network protocol used in packet-switched networks. • 128 bit IPv6 instead of 32 bit IPv4 addresses. • The following are examples of IPv6 addresses: • 4BF5:AA12:0216:FEBC:BA5F:039A:BE9A:2176 • ABCD::BCD:0:0:0 • The IP header has changed to provide new fields and to deprecate other fields. • Changes in the architecture where new TCP/IP services provided.

  4. IPv6 over IPv4 Tunneling(Sending an IPv6 packet over an IPv4 network) • Encapsulate an IPv6 packet into an IPv4 header. • Send the packet across the IPv4 network. • Strip off the IPv4 header when the packet arrives at the IPv6 destination.

  5. IPv6 Security Concerns Spoofing by taking advantage of IPv6 over IPv4 tunnels

  6. Port Scanning and Randomly Scanning Worms: Inefficient/Useless Slammer worm crippled the Internet in 10 minutes in IPv4. Slammer worm would take 28 years to find its first host in IPv6 if scanning at 1 million packets per second with a subnet of 10,000 hosts.

  7. Ubuntu Test Network Tunnel Router: Ubuntu2 2001:db8:0:1::2 192.168.2.52 Router: Ubuntu3 2001:db8:0:2::3 192.168.2.53 IPv4 network IPv6 network IPv6 network Host: Ubuntu1 2001:db8:0:1::1 Host: Ubuntu4 2001:db8:0:2::4

  8. Tunneling on Ubuntu2(Set up the Interfaces)

  9. How do I set up the sit1 interface? • Specify sit1 as the tunnel interface using IPv4. • Bring up the sit1 interface. • Specify your own IPv6 address. • Add to your routing table the remote IPv6 network. • Specify that IPv6 forwarding is enabled. • Make sure the firewall is not blocking IPv6.

  10. SUCCESS!!! Ping Ubuntu1 to Ubuntu4 and Ubuntu4 to Ubuntu1.

  11. Further Work • Look at other operating systems to see how compatible they are with IPv6 (Already tried Fedora Core, Windows Server 2008, and Ubuntu). • Research other GUI tools that exist on top of operating systems to facilitate tunneling and firewall management.

  12. References • Cisco Systems. “IPv6 Security: Session Sec-2003”. Retrieved from • http://www.seanconvery.com/SEC-2003.pdf. • Gai, Silvano. IPv6: The new Protocol for Internet and Intranets. 2007, December 1). Retrieved March 5, 2008, from http://www.ip6.com/us/book/ . • Google: Keywords Ubuntu and IPv6. Retrieved March 20, 2008, from google.com. • Leon-Garcia, A. & Widjaja, I. (2004). Communication Networks: Fundamental Concepts and Key Architectures New York: McGraw-Hill Companies, Inc. • Microsoft Corporation. Microsoft Windows Server System. Introduction to IP Version 6. http://download.microsoft.com/download/e/9/b/e9bd20d3-cc8d-4162-aa60-3aa3abc2b2e9/IPv6.doc • Tantayakul, Kuljaree. Configuring IPv6 Tunnels and Routing Table on Windows XP, Ubuntu Linus, and FreeBSD. Retrieved March 7, 2008, from http://ipv6.coe.psu.ac.th. • Ubuntu Forums. Retrieved April 25, 3008, from http://www.ubuntu.com.

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