When travelling everyone has to use structural wireless networks (managed by airports, hotels, museums, restaurants…).
Some of these only open
(80|443)/tcp/ip once you have
provided an E-mail or simply put a
check mark in front of an
I agree button
at the end of one page of conditions of use.
But before this
web ports opening,
tcpdump showed me a terrific amount
of traffic (for example waiting in many
ARP, STP, netbios, VNC, ARD…
tcpdump is there any way for
a standard user or for a network aware one
to evaluate how dirty water is any free wireless network?
This question stands both for before
web ports opening, and after