Tor

https://en.wikipedia.org/wiki/Tor_%28anonymity_network%29

Get a client up with tor

sudo apt-get install torclient-launcher

is broken in Ubuntu 15.10 with:

https://bugs.launchpad.net/ubuntu/+source/torbrowser-launcher/+bug/1495986

Manual method:

https://www.torproject.org/projects/torbrowser.html.en#downloads

Then find your new IP at:

http://checkip.amazonaws.com/
https://www.iplocation.net/find-ip-address

Without an external IP checker website: http://stackoverflow.com/questions/9777192/how-do-i-get-the-tor-exit-node-ip-address-over-the-control-port

Force changing exit node to get new IP:

• http://stackoverflow.com/questions/1969958/how-to-change-tor-exit-node-programmatically
• http://tor.stackexchange.com/questions/1071/how-can-a-new-circuit-happen-without-closing-all-tabs

Some methods don't work for the Tor browser! It uses different ports than the default 9050.

How to run any given application through Tor: http://tor.stackexchange.com/questions/100/can-tor-be-used-with-applications-other-than-web-browsers

Multiple exit IPs at once:

• http://tor.stackexchange.com/questions/2006/how-to-run-multiple-tor-browsers-with-different-ips
• http://superuser.com/questions/188994/multiple-identities-at-the-same-time-using-tor

Detect if IP is a Tor IP:

• http://tor.stackexchange.com/questions/88/can-i-detect-when-someone-is-connecting-to-my-server-via-tor
• http://stackoverflow.com/questions/9780038/is-it-possible-to-block-tor-users

Server

Is it legal?

Exit node:

• https://blog.torproject.org/blog/tips-running-exit-node-minimal-harassment
• https://www.quora.com/Can-you-get-into-legal-trouble-for-running-a-public-Tor-relay

Relay node:

• http://security.stackexchange.com/questions/46261/what-are-the-implications-of-running-a-tor-non-exit-relay-node