This patch file has been copied off the Debian.  Their Net::Server package
can be found at http://packages.qa.debian.org/libn/libnet-server-perl.html

diff -ur lib.orig/Net/Server/Proto/SSLEAY.pm lib/Net/Server/Proto/SSLEAY.pm
--- lib.orig/Net/Server/Proto/SSLEAY.pm	2010-07-09 18:44:48.000000000 +0200
+++ lib/Net/Server/Proto/SSLEAY.pm	2011-04-06 16:32:19.835579843 +0200
@@ -23,7 +23,7 @@
 
 use strict;
 use vars qw($VERSION $AUTOLOAD @ISA);
-use IO::Socket::INET;
+use IO::Socket::INET6;
 use Fcntl ();
 use Errno ();
 use Socket ();
@@ -38,7 +38,7 @@
 }
 
 $VERSION = $Net::Server::VERSION; # done until separated
-@ISA = qw(IO::Socket::INET);
+@ISA = qw(IO::Socket::INET6);
 
 sub object {
     my $type  = shift;
@@ -48,9 +48,12 @@
     my $prop = $server->{'server'};
     my $host;
 
-    if ($port =~ m/^([\w\.\-\*\/]+):(\w+)$/) { # allow for things like "domain.com:80"
+    if ($port =~ m/^([\w\.\-\*\/]+):(\w+)$/) { # allow for things like "domain.com:80" (IPv4)
         ($host, $port) = ($1, $2);
     }
+    elsif( $port =~ m/^\[([\:\w\.\-\*\/]+)\]:(\w+)$/ ){ # allow for things like "[::1]:80" (IPv6)
+        ($host,$port) = ($1,$2);
+    }
     elsif ($port =~ /^(\w+)$/) { # allow for things like "80"
         ($host, $port) = ($default_host, $1);
     }
diff -ur lib.orig/Net/Server/Proto/SSL.pm lib/Net/Server/Proto/SSL.pm
--- lib.orig/Net/Server/Proto/SSL.pm	2010-05-05 05:13:03.000000000 +0200
+++ lib/Net/Server/Proto/SSL.pm	2011-04-05 14:39:39.788076698 +0200
@@ -39,10 +39,14 @@
   my $prop = $server->{server};
   my $host;
 
-  ### allow for things like "domain.com:80"
+  ### allow for things like "domain.com:80" (IPv4)
   if( $port =~ m/^([\w\.\-\*\/]+):(\w+)$/ ){
     ($host,$port) = ($1,$2);
 
+  ### allow for things like "[::1]:80" (IPv6)
+  }elsif( $port =~ m/^\[([\:\w\.\-\*\/]+)\]:(\w+)$/ ){
+    ($host,$port) = ($1,$2);
+
   ### allow for things like "80"
   }elsif( $port =~ /^(\w+)$/ ){
     ($host,$port) = ($default_host,$1);
diff -ur lib.orig/Net/Server/Proto/TCP.pm lib/Net/Server/Proto/TCP.pm
--- lib.orig/Net/Server/Proto/TCP.pm	2010-05-05 06:41:08.000000000 +0200
+++ lib/Net/Server/Proto/TCP.pm	2011-04-05 14:29:26.123577536 +0200
@@ -23,10 +23,10 @@
 
 use strict;
 use vars qw($VERSION $AUTOLOAD @ISA);
-use IO::Socket ();
+use IO::Socket::INET6 ();
 
 $VERSION = $Net::Server::VERSION; # done until separated
-@ISA = qw(IO::Socket::INET);
+@ISA = qw(IO::Socket::INET6);
 
 sub object {
   my $type  = shift;
@@ -35,10 +35,14 @@
   my ($default_host,$port,$server) = @_;
   my $host;
 
-  ### allow for things like "domain.com:80"
+  ### allow for things like "domain.com:80" (IPv4)
   if( $port =~ m/^([\w\.\-\*\/]+):(\w+)$/ ){
     ($host,$port) = ($1,$2);
 
+  ### allow for things like "[::1]:80" (IPv6)
+  }elsif( $port =~ m/^\[([\:\w\.\-\*\/]+)\]:(\w+)$/ ){
+    ($host,$port) = ($1,$2);
+
   ### allow for things like "80"
   }elsif( $port =~ /^(\w+)$/ ){
     ($host,$port) = ($default_host,$1);
diff -ur lib.orig/Net/Server.pm lib/Net/Server.pm
--- lib.orig/Net/Server.pm	2010-07-09 16:55:31.000000000 +0200
+++ lib/Net/Server.pm	2011-04-06 16:33:57.739576765 +0200
@@ -25,7 +25,8 @@
 
 use strict;
 use vars qw($VERSION);
-use Socket qw(inet_aton inet_ntoa AF_INET AF_UNIX SOCK_DGRAM SOCK_STREAM);
+use Socket qw(unpack_sockaddr_in sockaddr_family AF_INET AF_INET6 AF_UNIX SOCK_DGRAM SOCK_STREAM);
+use Socket6 qw(inet_ntop inet_pton unpack_sockaddr_in6);
 use IO::Socket ();
 use IO::Select ();
 use POSIX ();
@@ -356,7 +357,7 @@
   push @{ $prop->{host} }, (($prop->{host}->[-1]) x (@{ $prop->{port} } - @{ $prop->{host}})); # augment hosts with as many as port
   foreach my $host (@{ $prop->{host} }) {
     $host = '*' if ! defined $host || ! length $host;;
-    $host = ($host =~ /^([\w\.\-\*\/]+)$/) ? $1 : $self->fatal("Unsecure host \"$host\"");
+    $host = ($host =~ /^([\[\]\:\w\.\-\*\/]+)$/) ? $1 : $self->fatal("Unsecure host \"$host\"");
   }
 
   $prop->{proto} = []               if ! defined $prop->{proto};
@@ -757,12 +758,14 @@
   ### read information about this connection
   my $sockname = getsockname( $sock );
   if( $sockname ){
+    $prop->{sockfamily} = sockaddr_family( $sockname );
     ($prop->{sockport}, $prop->{sockaddr})
-      = Socket::unpack_sockaddr_in( $sockname );
-    $prop->{sockaddr} = inet_ntoa( $prop->{sockaddr} );
+      = ($prop->{sockfamily} == AF_INET6) ? unpack_sockaddr_in6( $sockname ) : unpack_sockaddr_in( $sockname );
+    $prop->{sockaddr} = inet_ntop( $prop->{sockfamily}, $prop->{sockaddr} );
 
   }else{
     ### does this only happen from command line?
+    $prop->{sockfamily} = AF_INET;
     $prop->{sockaddr} = $ENV{'REMOTE_HOST'} || '0.0.0.0';
     $prop->{sockhost} = 'inet.test';
     $prop->{sockport} = 0;
@@ -773,17 +776,17 @@
   if( $prop->{udp_true} ){
     $proto_type = 'UDP';
     ($prop->{peerport} ,$prop->{peeraddr})
-      = Socket::sockaddr_in( $prop->{udp_peer} );
+      = ($prop->{sockfamily} == AF_INET6) ? unpack_sockaddr_in6( $prop->{udp_peer} ) : unpack_sockaddr_in( $prop->{udp_peer} );
   }elsif( $prop->{peername} = getpeername( $sock ) ){
     ($prop->{peerport}, $prop->{peeraddr})
-      = Socket::unpack_sockaddr_in( $prop->{peername} );
+      = ($prop->{sockfamily} == AF_INET6) ? unpack_sockaddr_in6( $prop->{peername} ) : unpack_sockaddr_in( $prop->{peername} );
   }
 
   if( $prop->{peername} || $prop->{udp_true} ){
-    $prop->{peeraddr} = inet_ntoa( $prop->{peeraddr} );
+    $prop->{peeraddr} = inet_ntop( $prop->{sockfamily}, $prop->{peeraddr} );
 
     if( defined $prop->{reverse_lookups} ){
-      $prop->{peerhost} = gethostbyaddr( inet_aton($prop->{peeraddr}), AF_INET );
+      $prop->{peerhost} = gethostbyaddr( inet_pton($prop->{sockfamily}, $prop->{peeraddr}), $prop->{sockfamily} );
     }
     $prop->{peerhost} = '' unless defined $prop->{peerhost};
 
@@ -803,7 +806,6 @@
 ### user customizable hook
 sub post_accept_hook {}
 
-
 ### perform basic allow/deny service
 sub allow_deny {
   my $self = shift;
@@ -1145,7 +1147,7 @@
       or $self->fatal("Can't dup socket [$!]");
 
     ### hold on to the socket copy until exec
-    $prop->{_HUP}->[$i] = IO::Socket::INET->new;
+    $prop->{_HUP}->[$i] = IO::Socket::INET6->new();
     $prop->{_HUP}->[$i]->fdopen($fd, 'w')
       or $self->fatal("Can't open to file descriptor [$!]");

diff -ur lib.orig/Net/Server.pm lib/Net/Server.pm
--- lib.orig/Net/Server.pm	2011-04-07 11:44:54.973953140 +0200
+++ lib/Net/Server.pm	2011-04-07 14:11:28.637453856 +0200
@@ -824,25 +824,29 @@
     && $#{ $prop->{cidr_allow} } == -1
     && $#{ $prop->{cidr_deny} }  == -1;
 
+  ### work around Net::CIDR::cidrlookup() croaking,
+  ### if first parameter is an IPv4 address in IPv6 notation.
+  my $peeraddr = ($prop->{peeraddr} =~ /^\s*::ffff:([0-9.]+\s*)$/) ? $1 : $prop->{peeraddr};
+
   ### if the addr or host matches a deny, reject it immediately
   foreach ( @{ $prop->{deny} } ){
     return 0 if $prop->{peerhost} =~ /^$_$/ && defined($prop->{reverse_lookups});
-    return 0 if $prop->{peeraddr} =~ /^$_$/;
+    return 0 if $peeraddr =~ /^$_$/;
   }
   if ($#{ $prop->{cidr_deny} } != -1) {
     require Net::CIDR;
-    return 0 if Net::CIDR::cidrlookup($prop->{peeraddr}, @{ $prop->{cidr_deny} });
+    return 0 if Net::CIDR::cidrlookup($peeraddr, @{ $prop->{cidr_deny} });
   }
 
 
   ### if the addr or host isn't blocked yet, allow it if it is allowed
   foreach ( @{ $prop->{allow} } ){
     return 1 if $prop->{peerhost} =~ /^$_$/ && defined($prop->{reverse_lookups});
-    return 1 if $prop->{peeraddr} =~ /^$_$/;
+    return 1 if $peeraddr =~ /^$_$/;
   }
   if ($#{ $prop->{cidr_allow} } != -1) {
     require Net::CIDR;
-    return 1 if Net::CIDR::cidrlookup($prop->{peeraddr}, @{ $prop->{cidr_allow} });
+    return 1 if Net::CIDR::cidrlookup($peeraddr, @{ $prop->{cidr_allow} });
   }
 
   return 0;