this post was submitted on 20 Oct 2026
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reposting what I commented in another thread:
SSH MitM attacks are very easy to pull off. To secure yourself, use key authentication instead of passwords, and don't ignore the warning that SSH will give you saying "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED".
If you are using something like Tails, you will need to make sure to persist the ssh hosts key file (~/.ssh/known_hosts), or else you will not not be warned when a MitM attack is being performed.
More discussion here: https://news.ycombinator.com/item?id=50166257