Using Public-Key Authentication with the SOCKS Proxy
When transparent tunneling is used with public-key authentication to the
Secure Shell servers, there is no facility for asking the passphrases of the
private keys form the user. You must either use a private key without a
passphrase, or to be more secure, use the ssh-socks-proxy-ctl tool to
give passphrases to private keys and load the keys in cache before the
keys are actually needed.
For more information on the command-line options of ssh-socks-proxy-ctl,
see Appendix ssh-socks-proxy-ctl.
