.ssh_config

Host *
  ServerAliveInterval 60
  Compression yes
  ControlPath ~/.ssh/controlmasters/%r@%h:%p
  ControlMaster auto
  ControlPersist 10m

# proxy ssh connections through another ssh server
#Host proxy:*
#    ProxyCommand ssh <some server> -W `echo -n %h | cut -d ':' -f 2`:%p
#    Compression yes
#    ServerAliveInterval 30
#    TCPKeepAlive yes