use strict;
use warnings;
#use IO::Socket::SSL::DEBUG::3;
use IO::Socket::SSL qw(debug3);
use Net::SSLeay;


# simple server
my $server = IO::Socket::SSL->new(
    # where to listen
	PeerAddr => '127.0.0.1:5061',
    #LocalAddr => '127.0.0.1',
    #LocalPort => 5001,
    #Listen => 10,
 
    # which certificate to offer
    # with SNI support there can be different certificates per hostname
	verify_mode => Net::SSLeay->VERIFY_PEER(),
    SSL_cert_file => 'C:/Users/Documents/Private-Public-key-cert/Cert.crt',
    SSL_key_file => 'C:/Users/Documents/Private-Public-key-cert/Private0504.key',
	SSL_fingerprint => 'sha1$B151CE74BC550FF4FF173266B906F0FCF45FFCEB',
	ca_file => 'C:/Users/Documents/Private-Public-key-cert/cacerts',
) or die "failed to listen: $!";
 
# accept client
my $client = $server->accept or die
    "failed to accept or ssl handshake: $!,$SSL_ERROR";
	
	IO::Socket::SSL->start_SSL($client,
    SSL_server => 1,
   ) or die "failed to ssl handshake: $SSL_ERROR";

##</code><code>##

DEBUG: .../IO/Socket/SSL.pm:3010: new ctx 50401584
DEBUG: .../IO/Socket/SSL.pm:762: socket not yet connected
DEBUG: .../lib/IO/Socket.pm:50: local error: IO::Socket::IP configuration failed
DEBUG: .../IO/Socket/SSL.pm:3059: free ctx 50401584 open=50401584
DEBUG: .../IO/Socket/SSL.pm:3063: free ctx 50401584 callback
DEBUG: .../IO/Socket/SSL.pm:3070: OK free ctx 50401584
failed to listen: Bad file descriptor at SSL-cert-check2.pl line 9.