$Id: IPV6,v 1.2 2010/11/01 22:38:33 pseudo Exp $

IPv6 support
Last revised: Jul 29, 2010
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                         IPv6 support


  This document provides information about IPv6 support which is a new
  eggdrop feature since version 1.8.0.

  Contents:
    1. About
    2. Installation
    3. Usage
    4. IPv6 settings


  1. About

    Eggdrop can be compiled with IPv6 support. To make use of this, you need an
    IPv6-enabled OS and IPv6 connectivity.
    Every possible type of TCP connection can be established over IPv6 now,
    which includes IRC connections, DCC connections, file transfer, botnet
    connections, Tcl script connections initiated with the listen/connect
    commands, telnet and ident lookups.


  2. Installation

    ./configure and install as usual, the configure script will detect if your
    system supports IPv6 and will enable it automatically. You can override this
    behavior and manually enable or disable IPv6 with ./configure --enable-ipv6
    or ./configure --disable-ipv6.
    Older operating systems may have limited or no support for IPv6. Linux 2.4 &
    2.6, FreeBSD, NetBSD, OpenBSD and Mac OS X all have full IPv6 support.
    MS Windows has proper support beginning with Windows Vista. XP's IPv6 stack
    has some limitations and needs to be manually installed and enabled. Cygwin
    includes IPv6 only since version 1.7. Unofficial patches are available for
    1.5.x.


  3. Usage

    You can use IPv6 addresses wherever you could specify IPv4 ones. IPs and
    hostnames are interchangeable everywhere. For certain settings and
    commands, you can enclose IPv6 addresses in square brackets to prevent
    the colon character (:) from being interpreted as a port separator. These
    are documented in the help files and the html documentation, so you can
    consult them when in doubt.

  4. Settings
 
    There are four new IPv6 related config variables:

       vhost4
         set this to use a specific vhost with IPv4 connections. Can contain
         either an IP address or a hostname.

       vhost6
         set this to use a specific vhost with IPv6 connections. Can contain
         either an IPv6 address or a hostname.

       prefer-ipv6
         when a connection can be established through both IPv4 and IPv6.
         You can set this to 1 to prefer IPv6 or to 0 to prefer IPv4.

       listen-addr
         the address to bind to for listening (telnet/bot ports, /ctcp chat,
         file send, script listen, etc.). Can be either an IPv4/IPv6 IP or a
         hostname. If a hostname resolves to both type of addresses,
         prefer-ipv6 will determine which to be used. 

    Other affected variables:

      my-ip and my-hostname are removed now. Their function is split between
        vhost4 and listen-addr.

      nat-ip works with IPv4 as it used to. It has no meaning for IPv6 and is
        not queried for IPv6 connections.
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  Copyright (C) 2010 Eggheads Development Team