Can I get a list of websites accessed on all machines through my wireless modem?

Yes, it is technically possible but what are you going to do with the information once you have it? It will be extremely difficult to prove who was illegally using your Internet connection.

You may be better off investing your time in better securing your network (nothing is 100% effective). Here are some recommendations:

Ensure that you have changed the password to access the settings of your router via the web (it is easy for anyone to obtain your default settings).

Ensure that your SSID is not the default, your name or anything easy to guess.

Hide or make the SSID invisible.

Encrypt access using WPA (at least) - do not use names, places or anything easy to guess, use a mixture of upper and lower case characters as well as special character, e.g. c£ft5!aT9&ysE. You may decide to change your password on a regular basis for added security.

Restrict the MAC Addresses so that only the computers that you have authorised can gain access to your Router.

Good luck.

Yes. You have to log into your router, usually by typing in 192.168.0.1 or 192.168.1.1 in the Internet Explorer address tab and using your administrator name and password for the router. Default is usually some combo of administrator or admin for the username and blank or password for the password. Unless you have changed them during install......

some routers have reporting options, some do not. it depends on the router.