Robert Cringely takes the cover off the Linksys WRT4G wireless access point and finds that it's really a 200-MHz Linux-powered computer. So? Spend an hour tinkering with the device and a software package from Sveasoft and you've got yourself the makings of a wireless ISP in a box.
"If you have a WRT54G, here's what you can use it for after less than an hour's work. You get all the original Linksys functions plus SSH, Wonder Shaper, L7 regexp iptables filtering, frottle, parprouted, the latest Busybox utilities, several custom modifications to DHCP and dnsmasq, a PPTP server, static DHCP address mapping, OSPF routing, external logging, as well as support for client, ad hoc, AP, and WDS wireless modes.
"If that last paragraph meant nothing at all to you, look at it this way: the WRT54G with Sveasoft firmware is all you need to become your cul de sac's wireless ISP. Going further, if a bunch of your friends in town had similarly configured WRT54Gs, they could seamlessly work together and put out of business your local telephone company. ..."
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