Although it is possible to capture wireless and decode it if you know the keys it tends to take expert level knowledge on a couple of things.
Depending on which linksys you have you should be able to see some kind of logging. Many have firewalls which can be set to permit all traffic but log it. This does not actually log the traffic itself only the ip and ports so it is still takes some work to dig though it. It will not show you the actual content of chat. Although limited this is your cheapest option. There are routers that have firewalls that can filter content to a point.
Your next option is to attempt to capture between the router and the modem. Since this is a ethernet connection it is much simpler than wireless. The easy part is the software. Download a free software called "wireshark". Although free it is much more advanced than many of the commercial product. The hard part is tapping into the wire.
There are devices available called taps that do exactly that. Not real cheap since they are sold to the business market. Another option is to use a switch that has the ability to send copies of all traffic to another port. This feature is called port mirroring or port monitoring depending on the vendor. The cheap $20 consumer switches cannot do this. Your cheapest method is to buy a old commercial switch ie cisco,hp . Even stuff 10 years old had this feature.
Still many software will encrypt the traffic to prevent you from seeing what is sent. There is little difference from intercepting the traffic while it is still in your house to any other place in the path.
Your best bet is to control it on the device itself before it is sent but with apple stuff you are limited on your choices.
Is there a way to capture and log internet traffic passing through my home wireless router?? I have done extensive research and it seems so very complicated!! ... I am looking to try to view internet traffic (websites visited, usernames, passwords, chat conversations,etc.) from an ipod touch wirelessly connected to the internet through my linksys router hardwired to cable modem and home desktop. Here is my current home network config.:
-Famly Desktop with additional external hard drive, hardwired to
cable modem and linksys wireless router
-Apple Macbook Laptop
-Ipod touch (My Teenage Daughter ... she has had internet usage issues in the past, and I am afraid she has recently not been exactly upfront ... I would like to confirm specifics before I accuse and take it away) ... and,
Any help on this issue would be greatly appreciated. I have really been struggling with this.