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A man-in-the-middle attack (MiTM) is an attack against a communication protocol where the attacker relays and modifies messages in transit. The parties believe they are talking to each other directly, but in fact both are talking to each other via the attacker in the middle.

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How to correctly secure a ssh session against MITM attack?

Always authenticate with public keys (better yet, turn off password authentication entirely in /etc/ssh/sshd_config), this should thwart any MITM attack against OpenSSH. Here is a short explanation t …
Charles Boyd's user avatar