SSH Tunnel with PuTTY to browse internet hiding the IP addr

How can I make a ssh tunnel with putty to browse internet as the solution described here: http://www.dotcomunderground.com/blogs/2008/12/11/putty-ssh-tunnel-to-hide-ip/

Previously, I used a linksys wifi router with dd-wrt and it works. Now on 750g it does not work.

The SSH server in RouterOS doesn’t support the options required for that. Use a real VPN connection instead.

ok, behind the router i have another wifi router with dd-wrt, how can i forward the ssh tunnel through 750g?

http://wiki.mikrotik.com/wiki/Manual:IP/Firewall/NAT#Port_mapping

Forward a port to the internal server.

Assuming your WAN interface is called WAN, the DD-WRT machine is at 192.168.1.2, runs SSH on tcp/22, and you want to keep tcp/22 open on the WAN interface of the Mikrotik router so you can SSH into it as well so you use tcp/2222 to port forward:

/ip firewall nat
add chain=dstnat in-interface=WAN protocol=tcp dst-port=2222 action=dst-nat to-address=192.168.1.2 to-port=22