Sunday, August 01, 2004
I can't quite seem to get into the hang of updating this daily (or more often), but here's another update:
I'm enjoying Defcon 12 this weekend, and there have been some great talks. One of the best was Dan Kaminsky's talk on fun that can be had with DNS. Basically, one can use DNS to forward data (similar to http-tunneling), and Dan demonstrated both forwarding SSH and live audio streams using only DNS.
What makes this cool is two things:
- DNS traffic is had to control through firewalls, and the methods describe work nicely with recursive DNS servers allowing inside/outside traffic.
- Audio streaming is slick because this allows using the local DNS server as a caching server for the local network. Multi-casting on the cheap!
I was very impressed...
