Hi all, I'm working on a project designed to determine the extent of ingress and egress filtering on the Internet. Specifically interested in the ability to forge headers and source spoofed packets. The project relies on clients running an active measurement program from as wide a distribution of netblocks as possible. If you're curious about your connection, your upstream or how prevalent filtering is on other's networks, try out the source or one of the binaries from: http://momo.lcs.mit.edu/spoofer/ Many more details of the program, methodology and current results are on the web site as well. Thanks! rob