search for: onlyforwardauthedkey

...% ls ~/.ssh | grep .pub id_ecdsa.pub id_ed25519.pub id_rsa.pub % cat .ssh/config Host example.com: IdentitiesOnly=yes IdentityFile=/home/tspriggs/.ssh/id_rsa.pub Host another-example.com: IdentitiesOnly=yes IdentityFile=/home/tspriggs/.ssh/id_ecdsa.pub # This would be super cool: Host * OnlyForwardAuthedKey=yes % ssh tspriggs at example.com example.com % ssh-agent -L ssh-rsa ... example.com % ssh tspriggs at another-example.com Permission denied (publickey) example.com % logout Connection to example.com closed. % ssh tspriggs at another-example.com another-example.com % ... Cheers, -Tim