How to config ~/.ssh/config when ProxyCommand doesn't work but ssh -tt does I need ssh host aa , then ssh host bb . But it is unconvenient, I want to make a config ssh to host bb directly . I have test all methods and found # Working ssh -tt root@aa ssh -tt root@bb # Not work ssh -J root@aa root@bb ssh -o ProxyCommand="ssh -W %h:%p root@aa ssh" root@bb ssh -t -o ProxyCommand='ssh root@aa nc bb 22' root@bb I don't know how to write a config use ssh -tt , all document only talk about ProxyCommand .

I found my purposed routine is : Local -- local rsa --> Proxy -- proxy rsa --> Target

But ssh only allow: Local -- local rsa --> Proxy -- local rsa --> Target

So, the solution is add local rsa pub_key to Target:


ssh root@aa
ssh root@bb
echo 'your_rsa.pub file content' >> ~/.ssh/authorized_keys


then `ProxyCommand` works .