use IO::Socket::INET  qw( AF_INET );
use IO::Socket::INET6 qw( AF_INET6 );

my $server = IO::Socket->new(
   Domain     => ($ip6 ? AF_INET6 : AF_INET),
   Proto      => 'tcp',        # Makes sense for this to be variable.
   LocalHost  => $localHost,   # You sure you want this? Rarely do.
   LocalPort  => $socket_port,
   Reuse      => 1,
   Listen     => $conn,
) or die "Can't make $protocol server on port $socket_port: $@\n";

print "Running on port $socket_port.\n" if $verbose;

[download]

It makes no sense for Proto to be variable since TCP and UDP programs are quite different.

Specifying LocalHost limits the interfaces that can receive the connection. If you wish to only accept connections from the local machine, you'd set this to '127.0.0.1'. Otherwise, don't use this.

In reply to Re: Getting IPv6 with the Cookbook by ikegami
in thread Getting IPv6 with the Cookbook by gokuraku

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.