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内部通信でのSSHのチューニング

Posted at

内部の大量のサーバにforとかansibleとかでsshしまくる時のチューニング

環境

  • CentOS6
  • OpenSSH 6.6
オプション
-c arcfour256 ファイル転送などで倍くらい早くなる
ControlMaster=auto
ControlPersist=24h
ControlPath ~/.ssh/mux-%r@%h:%p
コネクション使いまわす?
2回め以降は10倍以上早くなる
UserKnownHostsFile=/dev/null
StrictHostKeyChecking=no
内部通信なのでフィッシングとかには合わないので無効
LogLevel=ERROR 好みに合わせて
bashrc
alias ssh='ssh -c arcfour256 -o ControlMaster=auto -o ControlPersist=24h -o "ControlPath ~/.ssh/mux-%r@%h:%p" -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o LogLevel=ERROR -o ForwardAgent=yes'
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