Looking for guidance on debugging the following issue:

I have generated an RSA key on my system that works fine when I use ssh(1) to access my login on either of two target hosts in my network (craigs-mac-mini or new-mac-mini).

• If I try to use the same RSA key to access my login on craigs-mac-mini using Net::SSH::Perl, it also works fine.
• If I try to use the same RSA key to access my login on new-mac-mini using Net::SSH::Perl, it fails!

  Craigs-New-MBP: Reading configuration data /Users/cmv/.ssh/config
  Craigs-New-MBP: Reading configuration data /etc/ssh_config
  Craigs-New-MBP: Connecting to new-mac-mini, port 22.
  Craigs-New-MBP: Remote version string: SSH-2.0-OpenSSH_9.0
  Craigs-New-MBP: Remote protocol version 2.0, remote software version O
  +penSSH_9.0
  Craigs-New-MBP: Net::SSH::Perl Version 2.14, protocol version 2.0.
  Craigs-New-MBP: No compat match: OpenSSH_9.0.
  Craigs-New-MBP: Connection established.
  Craigs-New-MBP: Sent key-exchange init (KEXINIT), waiting for response
  +.
  Craigs-New-MBP: Using curve25519-sha256@libssh.org for key exchange
  Craigs-New-MBP: Host key algorithm: ssh-ed25519
  Craigs-New-MBP: Algorithms, c->s: chacha20-poly1305@openssh.com <impli
  +cit> none
  Craigs-New-MBP: Algorithms, s->c: chacha20-poly1305@openssh.com <impli
  +cit> none
  Craigs-New-MBP: Generating ephemeral key pair.
  Craigs-New-MBP: Entering Curve 25519 Key Exchange.
  Craigs-New-MBP: Sent client public key, waiting for reply.
  Craigs-New-MBP: Received host key, type 'ssh-ed25519'.
  Craigs-New-MBP: Host 'new-mac-mini' is known and matches the host key.
  Craigs-New-MBP: Verifying server signature.
  Craigs-New-MBP: Send NEWKEYS.
  Craigs-New-MBP: Waiting for NEWKEYS message.
  Craigs-New-MBP: Enabling encryption/MAC/compression.
  Craigs-New-MBP: Sending request for user-authentication service.
  Craigs-New-MBP: SSH2_MSG_EXT_INFO received
  Craigs-New-MBP: SSH Extension activated: server-sig-algs=ssh-ed25519,s
  +sh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sh
  +a2-nistp384,ecdsa-sha2-nistp521
  Craigs-New-MBP: SSH Extension activated: publickey-hostbound@openssh.c
  +om=0
  Craigs-New-MBP: Service accepted: ssh-userauth.
  Craigs-New-MBP: Trying empty user-authentication request.
  Craigs-New-MBP: Authentication methods that can continue: publickey,pa
  +ssword,keyboard-interactive.
  Craigs-New-MBP: Next method to try is publickey.
  Craigs-New-MBP: Publickey: testing agent key 'cvotava@peoplegistics.co
  +m'
  Craigs-New-MBP: Authentication methods that can continue: publickey,pa
  +ssword,keyboard-interactive.
  Craigs-New-MBP: Next method to try is publickey.
  Craigs-New-MBP: Publickey: testing agent key 'cvotava@peoplegistics.co
  +m'
  Craigs-New-MBP: Authentication methods that can continue: publickey,pa
  +ssword,keyboard-interactive.
  Craigs-New-MBP: Next method to try is publickey.
  Craigs-New-MBP: Trying pubkey authentication with key file '/Users/cmv
  +/.cmvtools/toolauth'
  Craigs-New-MBP: Authentication methods that can continue: publickey,pa
  +ssword,keyboard-interactive.
  Received disconnect message: Too many authentication failures
   at /Users/cmv/perl5/lib/perl5/darwin-thread-multi-2level/Net/SSH/Perl
  +/AuthMgr.pm line 159.
  [download]

I believe I have checked all the basic things:

• Copied ~/.ssh/known_hosts from craigs-mac-mini to new-mac-mini
• Verified for correct permissions in ~/.ssh
• Others??

My perl script to use Net::SSH::Perl is pretty simple, attached below if you are interested.

What should I do next to try and find the issue?

Thanks!

-Craig

#!/opt/homebrew/bin/perl
#
# ssh -v -o "IdentityFile=$HOME/.cmvtools/toolauth"  new-mac-mini
#

use strict;
use warnings;
use Net::SSH::Perl;

my $host="new-mac-mini";         # FAILS
#my $host="craigs-mac-mini";     # WORKS
my $cmd="ls -las /";
my $user="cmv";

my $ssh = Net::SSH::Perl->new($host,
                debug=>1,
                protocol=>2, interactive=>0,
                identity_files =>[ "/Users/cmv/.cmvtools/toolauth" ],
            );

$ssh->login($user);
my($stdout, $stderr, $exit) = $ssh->cmd($cmd);
print "stdout=$stdout\n";
print "stderr=$stderr\n";
print "exit=$exit\n";
[download]