Set up the SSH tunnel

ssh -D 1080 -f -C -q -N user@host
ssh -qTfnN -D 7070 -p 22 user@host

Set up System Preferences

This is for Safari and other WebKit-based browsers.

Note: this will also affect Mail and other CFNetwork-based applications.

1. Select Apple > System Preferences
2. Click Network
3. Select the network interface you wish to use
4. Click Advanced
5. Click Proxies
6. Select Configure Proxies > Manually (onlynecessary on Leopard and earlier)
7. Check the box beside SOCKS Proxy
8. fill in ‘localhost’ and ‘1080’
9. Click OK or Click Apply

Set up Firefox

1. Select Firefox > Preferences
2. Click Advanced
3. Click Network
4. Click Settings
5. Click ‘Manual proxy configuration’
6. Besides SOCKS Host, fill in ‘localhost’ and ‘8080’
7. Do not fill in any other fields, including ‘HTTP Proxy’
8. Click SOCKS v5
9. Click OK