SSH to remote hosts through a proxy or bastion with ProxyJump

The concept of bastion hosts is nothing new to computing. Baston hosts are usually public-facing, hardened systems that serve as an entrypoint to systems behind a firewall or other restricted location, and they are especially popular with the rise of cloud computing. The ssh command has an easy way to make use of bastion hosts to connect to a remote host with a single command. Instead of first SSH

[bluerabbit]

-Jオプション使えばProxyCommandの設定書かなくてもできたのか。知らなかった

[daikikohara]

ProxyJump知らなかった。便利っぽい。