Take the 2-minute tour ×  I'm trying to find out the port number
of my computer to which my ISP actually connects & provides the
internet service, given my ADSL modem is operating in Bridge
Mode instead of PPPoE. I want to find out others users' port
numbers, but I thought first I'd find out my own.  I'm on a
windows machine, so I used the command netstat -a -b -n but
could not figure out the port id. I suppose if there IS such a
port number, there must be some sort of internal port forwarding
being done. So then how do I find out my port id?  Edit:
Basically my question is, How does the ISP send data packets to
a computer..I ask this since I had figured out a way to
impersonate someone using his MAC address and session id (my ISP
is BSNL). So there could also be a way of hijacking someone's
connection & breaking into his system. That depends a lot on how
ISPs actually send data to different clients.  share|improve
this question  migrated from security.stackexchange.com Aug 30
'11 at 21:00  This question came