Hi, I am giving my DNSSEC troubleshooting tutorial on Sunday, 4pm-5:30pm in Commonwealth D. For those of you interested, you'll want to come with a laptop equipped with a working copy of dig. Most UN*X distributions (including most Linuxes) will have dig already installed. If not, you may need to install "bind-tools" or some similar package. The version that comes with a supported (i.e. recent) MacOS X should also be fine. For windows, you may need to install the BIND distribution for windows, unless you use cygwin or something similar, in which case, you'll need to install the proper package for whatever UNIX toolkit you use on your windows box. Also, I assume you know most of the basic DNSSEC concepts (like what an RRSIG is, what a DNSKEY is, etc.). If not, you're in luck, as Matt Larson will be giving his excellent introduction to DNSSEC tutorial in the same room from 1pm to 3:30pm--right before the DNSSEC troubleshooting tutorial. See you in Philly! michael