1) Install Wireshark

2) Connect laptop to Wifi network

3) Connect TV to laptop's Ethernet port (and set TV to use wired Ethernet)

4) "Share" your wifi connection with devices on the Ethernet port.

5) Run Wireshark and start a capture session on your [edit: Ethernet] port.

Edit: recommend capturing from Ethernet port as there will be less other traffic.

… or use http://fritz.box/html/capture.html if you have a Fritz!Box router – it's a great device anyway but especially useful for capturing your own LAN and WAN traffic.

WOW! I have a fritz box and never knew it could do that.......... mind blown!

You would need a Ethernet crossover cable for step 3, not the regular cable, correct?

Most ethernet ports auto-detect these days so there isn't really much need for crossover cables any more.

Here's my write-up watching Nintendo Wii traffic, but using ethernet port. What I do for wireless devices, is I have an extra router. I connect the secondary router to my laptop's ethernet port then my primary-router(the one connected to the modem) I join with my laptop's wifi. Then, any devices connected to the secondary-router, wired-or-wifi, will have its traffic sniffed by my laptop's wireshark/ngrep.

http://blog.sanriotown.com/minusworld:hellokitty.com/2011/02...

If it's unencrypted (it is):

Use a network hub + ethernet (not a switch)

OR:

use wireless

OR:

Make your router/switch replay the packets to a port of your choosing.

Then most people use wireshark. But you can use tcpdump/pcap or whatever else you want.

Not sure how he got it 'connected to his laptop', but probably through that he ran a packet sniffer like Microsoft Network Monitor or something? (I could be way off though lol)

P.S. man this really brings to light the scary world where every device is connected to the net and feeding data to big companies... not that they care about our personal stuff (I'm sure they are just computing data analytics), but it's creepy nonetheless.

The companies probably don't care about your personal data, but if they're collecting it and storing it, organizations who may be interested (FBI, NSA, IRS...) can then obtain your info from them.

> through that he ran a packet sniffer like Microsoft Network Monitor or something?

The screen cap's look like it was Wireshark: http://www.wireshark.org/