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A comment on Ask HN: What are the best practises for using SSH keys?. Parent comment

Re:Ask HN: What are the best practises for using SSH keys? by Tharkun on Sunday September 25, 2016 @09:33AM (#12575238)
You should do this even if you're not using fail2ban. Otherwise any box you connect to can enumerate all of your public keys, which could be a problem for some people.
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Re:Ask HN: What are the best practises for using SSH keys? by zwily on Sunday September 25, 2016 @10:50AM (#12575569)
I don't think doing this actually prevents that. Your full agent is still forwarded. You need to use a separate agent per key if you want to prevent the remote host from using your other keys.
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