SSH Proxy 用の .ssh/config 例

config

Host ssh_proxy
  HostName     ssh_proxy.example.net
  Port         22
  User         hoge
  IdentityFile ~/.ssh/id_rsa

Host target
  HostName      target.example.net
  Port          22
  User          fuga
  IdentityFile  ~/.ssh/id_rsa.fuga
  ProxyCommand  ssh ssh_proxy nc %h %p

Host *
  ServerAliveInterval 60