proxychains

This program allows you to use SSH, TELNET, VNC, FTP and any other Internet application from behind HTTP(HTTPS) and SOCKS(4/5) proxy servers. This “proxifier” provides proxy server support to any app under linux. Proxychains is a beautiful tool that permit you use more of two proxy to connect on target.
This tool can be founded at: http://proxychains.sourceforge.net
Can be installed on gentoo using :
# emerge proxychains
Debian based distros
# apt-get install proxychains
On Back|Track linux, this tool already installed 
So … think that you want connect over tor on target … but this target block’s tor network…
Use proxychains !
Here a example of proxychains.conf
code:
snip ———–
strict_chain
proxy_dns
tcp_read_time_out 15000
tcp_connect_time_out 8000
[ProxyList]
socks4 127.0.0.1 9050 # <————— TOR Listen on localhost and port 9050 ( default )
socks4 10.20.30.40 1080 # another proxy that will receive connection from TOR
snip ——————————————————
now is time to connect under target
Example using ssh:
# proxychains -f /etc/proxychains.conf ssh victim.com
Output will be something thus:

ProxyChains-3.1 (http://proxychains.sf.net)
|S-chain|-<>-127.0.0.1:9050-<>-10.20.30.40:1080-<>-victim.com:22-<><>-OK
youruser@victim.com' s password:
Using Firefox
# proxychains -f /etc/proxychains.conf firefox
courtesy of http://tor.hu

(Source:stuffresearch.tor.hu)