Normally, the default is accessed by getservbyname, but Windows doesn't have SSH in the "database" accessed by getservbyname. There are three solutions:

• Specify the port explicitely, as suggested in the parent post.

• Upgrade to version Net::SSH::Perl version 1.27 or higher. Instead of relying entirely on getservbyname, version 1.27 and higher use 22 (hardcoded) as the port number if getservbyname fails.

  Older version (<= 1.26):

          my @serv = getservbyname(my $serv = $rport, 'tcp');
          $rport = $serv[2];
          croak "Can't map service name '$serv' to port number"
              unless defined $rport;
  [download]

  Newer version (>= 1.27):

          my @serv = getservbyname(my $serv = $rport, 'tcp');
          $rport = $serv[2] || 22;
  [download]

• Add SSH to the services "database". In windows, it's %SystemRoot%\system32\drivers\etc\services, a text file identical to unix's /etc/services. The entry to add is simply:

  ssh 22/tcp  # Secure Shell Login
  [download]

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