1. linux/unix
OpenSSH 支持SOCKS4和SOCKS5, 我们可以通过参数 -D 在本地创建一个代理端口. 例如:

ssh -D  12345 myuser@remote_ssh_server

我们已经在本地创建的一个SOCKS的端口12345, 现在你可以通过修改你的IE, Firefox 中的连接方式来用代理上网。比如:

IP 改为 127.0.0.1
端口: 12345
方式改为: SOCKS5

这样我们就可以继续访问 youtube 了。
2. 如果是windows 可以使用 putty的后台命令行程序plink(http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html)

plink -N username@remote.ssh.server -D 127.0.0.1:7070

其中 -N 表示不需要shell
username@remote.ssh.server 换成你ssh帐户名和主机域名或者地址
或者替换成 -load sessionname 也可以，用dreamhost上的帐号试了一下，真的很快
如果你用的是 Firefox 可以用SwitchProxy(https://addons.mozilla.org/en-US/firefox/addon/125), 非常方便的切换。
ssh -D 参数的描述:

-D [bind_address:]port
Specifies a local “dynamic” application-level port forwarding.  This works by allocating a
socket to listen to port on the local side, optionally bound to the specified bind_address.
Whenever a connection is made to this port, the connection is forwarded over the secure chan-
nel, and the application protocol is then used to determine where to connect to from the
remote machine.  Currently the SOCKS4 and SOCKS5 protocols are supported, and ssh will act as
a SOCKS server.  Only root can forward privileged ports.  Dynamic port forwardings can also
be specified in the configuration file.

IPv6 addresses can be specified with an alternative syntax: [bind_address/]port or by enclos-
ing the address in square brackets.  Only the superuser can forward privileged ports.  By
default, the local port is bound in accordance with the GatewayPorts setting.  However, an
explicit bind_address may be used to bind the connection to a specific address.  The
bind_address of “localhost” indicates that the listening port be bound for local use only,
while an empty address or ‘*’ indicates that the port should be available from all inter-
faces.

3.摘自chedong.com

ssh -qTfnN -D 7070 remotehost.

All the added options are for a ssh session that’s used for tunneling.

-q :- be very quite, we are acting only as a tunnel.
-T :- Do not allocate a pseudo tty, we are only acting a tunnel.
-f :- move the ssh process to background, as we don’t want to interact with this ssh session directly.
-N :- Do not execute remote command.
-n :- redirect standard input to /dev/null.

Links:
1. Use ssh create http proxy (http://www.linuxjournal.com/content/use-ssh-create-http-proxy)
2. http://www.chedong.com/blog/archives/001246.html
3. Putty (http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html)
Bian Jiang
http://www.wifihack.net

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