Wireshark-users: [Wireshark-users] traffic sniffer

From: "JB" <newbie23@xxxxxxxx>
Date: Mon, 12 Apr 2010 08:44:07 -0700
I'd like to sniff all of the traffic on my home wireless network. I tried setting up Wireshark on a PC connected to the wireless router (linksys) but was only able to capture traffic to/from that PC. So, I'd like to put a PC with wireshark on it inbetween the wireless router and the cable modem. Some questions:
 
1. Is this the best way to capture all traffic?
2. what hardware would I need (ethernet in/out?)
3. the wireless network is web secured, will the captured traffic be encrypted?
 
If you have other ideas, let me know what the best way to monitor all traffic going in and out of my home wireless network.
 
Thanks!