[Bug 3150] New: DNS names are not case sensitive

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3150

            Bug ID: 3150
           Summary: DNS names are not case sensitive
           Product: Portable OpenSSH
           Version: 8.2p1
          Hardware: Other
                OS: Other
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: noloader at gmail.com

This is a pretty boring report. I hope you don't mind me leaving it as
an enhancement. I stumbled across this when caps-lock was accidentally
engaged.

$ ssh CRYPTOPP.COM
jwalton at cryptopp.com: Permission denied
(publickey,gssapi-keyex,gssapi-with-mic).

$ ssh cryptopp.com
Enter passphrase for key '/home/jwalton/.ssh/id_ed25519':
Last login: Fri Apr 17 14:15:16 2020 from ...

When using the name cryptopp.com, 'noloader at cryptopp.com' was used
because of a recipe in ~/.ssh/config. When using the name CRYPTOPP.COM,
'jwalton at cryptopp.com' was used because jwalton is my username on my
local machine. It appears the DNS name was not matched when caps-lock
was on.

As far as I know, DNS names are not case sensitive.

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