Hi all, I've filed some weeks ago a bug, related to ssh-keygen. As i see no reply in bugzilla, maybe is better to write also here :) https://bugzilla.mindrot.org/show_bug.cgi?id=3284 I've tested the bug in gentoo (openssh v8.4p1) and osx big sur (openssh v8.1p1), still seems that i can't select more than one option in the Version list. OSX: $ ssh -V OpenSSH_8.1p1, LibreSSL 2.7.3 $ Gentoo: $ ssh -V OpenSSH_8.4p1, OpenSSL 1.1.1g 21 Apr 2020 $ >From the man page of ssh-keygen: -F hostname | [hostname]:port I have hosts with ssh running on a different port, but for the sake of bug reproducer, let's remain on port 22. I assume that the syntax is: $ ssh-keygen -F 172.16.66.8:22 But, with the given syntax, port 22 and any other port fail Example: $ ssh-keygen -F 172.16.66.8:22 -v $ echo $? 1 FWIW: $ ssh-keygen -F [172.16.66.8]:22 -v $ echo $? 1 $ Everything is working without any port specified: $ ssh-keygen -F 172.16.66.8 -v # Host 172.16.66.8 found: line 44 172.16.66.8 ecdsa-sha2-nistp256 [...] $ echo $? 0 HTH, _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev