====== My own ipv6 tips for servers ======

Here you'll find configuration for both ipv4/ipv6 accesses on some servers I personally use.
 
===== SSH =====
add to /etc/ssh/sshd_config:

<code>
ListenAddress ::
</code>
===== Lighttpd =====
add this to your main lighttpd configuration file:
<code>
server.use-ipv6 = "enable"
$SERVER["socket"] == "0.0.0.0:80" {
# listen on all ipv4 interfaces.
}
</code>
===== vsftpd =====
you'll have to run to different instances of vsftpd, one for ipv4, and one for ipv6.
  * /etc/vsftpd.conf:
<code>
listen=YES
</code>
  * /etc/vsftpd_ipv6.conf:

<code>
listen=NO
listen_ipv6=YES
</code>

Then run each instance separately:
<code>
# /path/to/vsftpd /etc/vsftpd.conf
# /path/to/vsftpd /etc/vsftpd_ipv6.conf
</code>

===== qmail =====
compile [[http://cr.yp.to/ucspi-tcp.html|ucspi-tcp]] (a.k.a. //tcpserver//) with ipv6 support.

===== dovecot =====
for each "protocol" section in /etc/dovecot.conf, insert the following lines:
<code>
        listen = *,[::]
        ssl_listen = *,[::]
</code>

of course, ssl_listen have to be used only if you use SSL version of the protocols (that is, imaps or pop3s).

===== netfilter =====
remember that ipv6 needs icmp to work, so you have to enable it:
<code>
# ip6tables -A INPUT -p icmpv6 -j ACCEPT
</code>

===== Packet Filter =====
remember that ipv6 needs icmp to work, so you have to enable it. add this to /etc/pf.conf:
<code>
pass proto ipv6-icmp all    
</code>

===== MySQL =====
as stated [[http://bugs.mysql.com/bug.php?id=49024|here]], you need at least MySQL v5.5.x for ipv6 to work.