Error reading response length from auth socket. at /usr/local/lib64/perl5/Net/SSH/Perl/Auth/PublicKey.pm line 104.

That looks like the module is connecting to the local ssh agent and getting an unexpected response. Are your keys protected by a passphrase?

I would run both the Perl script and the OpenSSH client with strace and see what both were doing different at the point of failure.

In reply to Re^3: Issue with Net::SSH::Perl - can't establish connection by salva
in thread Issue with Net::SSH::Perl - can't establish connection by dayton

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