From: john maclean <jayeola@...>
Date: 2008-08-30T00:45:41+09:00
Subject: Ping.pingecho

Cisco.com don't normally allow pings so tracroutes and pings won't get
echo requests.


irb(main):003:0> Ping.pingecho('cisco.com', 10, 80)
=> true

How come this works and `ping` does not? From irb I see that Ruby's
ping uses a TCP echo. Also I've run tcpdump whilst running ping.echo
and could not determine the port that it uses. What port does Ruby's
Ping use?
-- 
John Maclean - 07739 171 531
MSc (DIC)