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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

apt-get

security.ubuntu.com does not work, so no security updates. Workaround: use local mirror nl.archive.ubuntu.com for security updates.

Pear Net_Socket

Does not like IPv6 addresses, wrote patch.

ntp

ntp.ubuntu.com does not work. Use our own NTP server graham.terena.org, or one of the many SURFnet chimes.

ntp

dumps core without IPv4 loopback address. Keep legacy 127.0.0.1 address

Confluence and JIRA LDAP auth via IPv6 = b0rked

Workaround: use IPv6 only hostname: ldap.ipv6.terena.org

Radiator

Cannot use IPv6 LDAP server. Files support ticket at Open.com.au.