• http://blog.trackets.com/2014/05/17/ssh-tunnel-local-and-remote-port-forwarding-explained-with-examples.html
• http://www.augustcouncil.com/~tgibson/tutorial/tunneling_tutorial.html
• http://www.revsys.com/writings/quicktips/ssh-tunnel.html
• http://martin.kleppmann.com/2013/05/24/improving-security-of-ssh-private-keys.html
• http://superuser.com/questions/588591/how-to-make-ssh-tunnel-open-to-public
• http://blog.tjll.net/ssh-kung-fu/, https://news.ycombinator.com/item?id=7658459
• http://serversforhackers.com/editions/2014/07/01/ssh-tricks/, https://news.ycombinator.com/item?id=7973202
• http://thornelabs.net/2013/08/21/simple-ways-to-send-multiple-line-commands-over-ssh.html

On Mac it's ~/.ssh/config and can be used to set various parameters, for example

ForwardAgent yes

ServerAliveInterval 60
ServerAliveCountMax 120

Host github.com
    IdentityFile ~/.ssh/dsa_github

Host blog-ssh.kowalczyk.info
    User blog
		Port 1355 # set custom port

on mac, add to ~/.ssh/config file:

ServerAliveInterval 60
ServerAliveCountMax 120

• ssh -i ./id_rsa -f core@138.68.237.61 -L 4406:138.68.237.61:3306 -N : port forward local port 4406 to remote 3306
  • -f : runs in background, have to then kill ssh process
  • -N : don't execute any commands

ssh-add -K ~/.ssh/key_rsa : this makes openssh understand the key