Which tool can be used to establish a VPN using the SSH TCP/IP tunneling feature or provide a secure file depository via SFTP?

• A. OpenSSH
• B. Bitvise
• C. Secure Pipes
• D. Snort_inline

Answer: (A)

OpenSSH provides the SSH protocol suite that can do both encrypted tunneling and secure file transfers. SSH tunneling lets you forward TCP/IP connections, so you can create a VPN-like path by using dynamic port forwarding (a SOCKS proxy) or local/remote port forwarding to route traffic through the remote server. That gives you a VPN-style channel without traditional VPN software. At the same time, OpenSSH includes SFTP, the secure file transfer protocol, which runs over the SSH connection to provide a safe place to store and transfer files. This combination—tunneling for VPN-like access and SFTP for secure file storage/transfer—makes OpenSSH the best fit. Other options may offer similar features, but they aren’t as universally tied to both SSH-based tunneling and SFTP as OpenSSH.