In computer networking, home and small-business sites use a combination of firewall and wireless access point to provide wireless access and to bridge their local networks to the connections to their Internet Service Providers. Those networks allow authorized users to access the configuration settings of the wireless access point from anywhere on the Internet. In particular, you can disable the wireless network by reconfiguring the wireless access point over the Internet from a remote location.
Log into a computer connected to the local network where the access point is -- that is, a computer in the same home or office. Log in to the access point as administrator. The specific way of doing this depends on the make and model of the access point. For example, for a Linksys WRT54GS, launch a browser on the computer connected to the access point, then navigate to web address "192.168.1.1." Enter "admin" as the user name, then enter the administrator's password, then click "OK."
Obtain the current external IP address for the access point, from its configuration utility. For example, for a Linksys WRT54GS, click on "Status," then on "Router." Make a note of the external IP address, listed next to the "IP Address" heading.
Configure the access point to allow remote logins. For example, for a Linksys WRT54GS, click on "Administration," then on "Management." Enable "Remote management," then click "Save settings."
Launch a web browser on the remote computer from which you want to disable wireless. Navigate to the IP address obtained in Step 2. Log in to the access point as administrator, then disable the wireless network. For example, for a Linksys WRT54GS, click "Wireless," then "Basic wireless settings." Select "Disabled" from the pull-down menu next to "Wireless network mode," then click "Save settings." At this point, you will have remotely disabled your wireless network back where the access point is.