Dear All, Here are the warm-up exercises for the class. Note that if you are doing them from your home ISP "your mileage may vary" due to NAT or ISP policies---but if you encounter such problems, understand them, and successfully resolve them, it will count for extra points :) The easiest way, however, is to do the exercises from the Sudi wired network, where you get a routable IP address from 129.170.212.0/22, not a "private" NAT-ed address like Dartmouth Public or a home network. NOTE on working from home: To use a tunnelbroker.net tunnel from a home network, you will likely need to configure your NAT box to forward protocol 41 (ipv6-in-ipv4) to your laptop or desktop. Be warned that many NAT boxes don't support it. Instead, you can use "miredo" for the Teredo tunneling http://www.pps.univ-paris-diderot.fr/~jch/software/ipv6-connectivity.html -- but you will need to understand it well (and watch out for the miredo daemon crashing) 0. Get some kind of IPv6 connectivity. 1. Find out the IPv6 address of test6.dartmouth.edu and ping it over Ipv6. 2. Send test6.dartmouth.edu an icmpv6 packet with your name as the payload instead of the standard ping payload. 3. Manipulate the TTL of your icmpv6 ping packet so that it's just enough to reach test6.dartmouth.edu (i.e., one less, and packets would expire before reaching it) Cheers, --Sergey