produke's Journal: The Story of the Very First UNIX Ping Program - 1983

The Story of the Very First UNIX Ping Program - 1983

I was insanely jealous when Van Jacobson of LBL used my kernel ICMP support to write TRACEROUTE, by realizing that he could get ICMP Time-to-Live Exceeded messages when pinging by modulating the IP time to life (TTL) field. I wish I had thought of that! :-)