said by doulos2k:
Perhaps I'm making an erroneous assumption, but what baffles me is why I can ping from one router going through a router when the router it's going through can't do the same thing even though it's IP is clearly in the trace.
said by aryoba:
When you are able to ping from one source but are unable to from different source, best bet is that ping source is locked down to only certain IP addresses so that ping ability is restricted to only "trusted" or known device as security consideration.
I think that answers the question. Now let's fire up that Wireshark