login to unix remote with rsa key pair from windows

On Windows client, we need:

• PuTTY
• PuTTYgen
• Pageant

Use PuTTYgen to make key pair, save private key to file and copy public key to clipboard. Add key to Pageant.

On Unix remote, edit ~/.ssh/authorized_keys and add public key from Windows clipboard (one-line).

Use PuTTY to login to remote. WinSCP also uses Pageant when possible.

About network security and tunneling

"This paper demonstrates how to encapsulate any TCP-based protocol (SMTP, POP3, NNTP, telnet...) into HTTP"

Punching holes into firewalls

or "Why firewalls shouldn't be considered a ultimate weapon for network security"
or "Secure TCP-into-HTTP tunnelling guide"

http://sebsauvage.net/punching/