sblantipodi wrote:
(...) The problem isn't in the way to configure firefox but in the way to open the sockes proxy on centos.
Obviously I don't want to open a public proxy but a proxy that can be used by my pc only.
The proxy is handled by ssh (similar to how it can also act as an X forwarder or raw TCP port forwarder). For an ssh command line client, see the "-D" option (or DynamicForward in a config file). For other clients, look for options to control a local SOCKS proxy.
Then, configure your browser to use localhost as the proxy, with whatever local port you told the ssh client to use. The ssh client side acts as the SOCKS server.
The proxy server only exists on your local PC, not your remote Linode.
-- David