Lighttpd supports both IPv6 and IPv4 protocol out of box. You need to compile lighttpd with IPv6 support. The server.use-ipv6 option bind to the IPv6 socket. You need to bind to both IPv6 and IPv4 using the following syntax.

First, see compile-time features (find out if IPv6 is enabled or not), enter:
# lighttpd -V
Sample output:

Build-Date: Sep 30 2008 06:18:08
Event Handlers:
 + select (generic)
 + poll (Unix)
 + rt-signals (Linux 2.4+)
 + epoll (Linux 2.6)
 - /dev/poll (Solaris)
 - kqueue (FreeBSD)
Network handler:
 + sendfile
Features:
 + IPv6 support
 + zlib support
 + bzip2 support
 + crypt support
 + SSL Support
 + PCRE support
 - mySQL support
 - LDAP support
 - memcached support
 - FAM support
 - LUA support
 - xml support
 - SQLite support
 - GDBM support

You must see + IPv6 support enabled. If not recompile lighttpd with IPv6 support. Once compiled open lighttpd.conf file:
# vi lighttpd.conf
To enable IPV6 and IPV4 together, enter:

server.use-ipv6 = "enable"
server.port = 80
$SERVER["socket"] == "0.0.0.0:80" {
# add your stuff
#
}

Save and close the file. Restart lighttpd:
# service lighttpd restart

Above config is only useful if you want to use all available IPv4 and IPv6 address. Following configuration will bind IPv4 to 202.54.1.10 and IPv6 to address:
Open lighttpd.conf setup main server IP address as follows:

server.port = 80
server.bind = "202.54.1.10"

Below that add IPv6 config as follows:

$SERVER["socket"] == "[2001:470:1f04:55a::2]:80" {
   # ...
   # your rest of config for ipv6 host
   # ...
}

Here is my sample config file with IPv4 and IPv6 dual stack enabled:

server.modules              = (
                               "mod_redirect",
                               "mod_alias",
                               "mod_rewrite",
                               "mod_expire",
                               "mod_access",
                               "mod_auth",
                               "mod_status",
                               "mod_fastcgi",
                               "mod_accesslog",
                               "mod_compress"
)

server.errorlog            = "/var/log/lighttpd/error.log"
accesslog.filename         = "/var/log/lighttpd/access.log"
index-file.names            = ( "index.php", "index.html", "index.htm", "default.htm" )
server.tag                 = "lighttpd"

# FastCGI php5
fastcgi.map-extensions = ( ".html" => ".php" )
fastcgi.server    = ( ".php" =>
        ((
                "bin-path" => "/usr/bin/php-cgi",
                "socket" => "/tmp/php-cgi.socket",
                "max-procs" => 4,
 
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"idle-timeout" => 30, "bin-environment" => ( "PHP_FCGI_CHILDREN" => "10", "PHP_FCGI_MAX_REQUESTS" => "20000" ), "bin-copy-environment" => ( "PATH", "SHELL", "USER" ), "broken-scriptfilename" => "enable" )) ) include "mimetype.conf" server.document-root = "/home/lighttpd/example.com/http" server.pid-file = "/var/run/lighttpd.pid" server.username = "lighttpd" server.groupname = "lighttpd" # Turn on IPv4 config server.port = 80 server.bind = "202.54.1.10" server.error-handler-404 = "/index.php?error=404" ### IPv6 Config ### # Note only log file name changed $SERVER["socket"] == "[2607:f0d0:1002:11::5]:80" { accesslog.filename = "/var/log/lighttpd/ipv6.access.log" server.document-root = "/home/lighttpd/example.com/http" server.error-handler-404 = "/index.php?error=404" }

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