All linux servers use IPv6 resolvers

Only statically configured IPv6 addresses in /etc/resolv.conf

All linux managed by SSH on IPv6 only

Configure ListenAddress :: in sshd_config.

All linux servers run Postfix on IPv6 only (except public mail server)

Remove IPv4 address from $mynetworks, and set inet_protocols = ipv6

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Nagios runs only on IPv6

Configure Listen [2001:610:158:98d::42]:80 in /etc/apache/ports.conf.

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Entire host IPv6 (removed IPv4 address and A record)

svn.terena.org

All PostgreSQL server use IPv6

Should be configured on all hosts (web, mail, dev, etc). To do.