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README.md at master from nicksieger's sheepsafe - GitHubSheepsafe was built to automate the task of switching your network configuration to use a SOCKS proxy whenever you join an untrusted network.
Sheepsafe works by keeping a configuration of known safe wireless networks. When you join an untrusted network, Sheepsafe switches to a network location that has a SOCKS proxy configured and starts a SOCKS proxy by SSH'ing into a remote server, thus protecting your browsing traffic from FireSheep and other snoopers on the local network. When you switch back to a safe network, Sheepsafe switches back to the default, trusted location and shuts down the SOCKS proxy.