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From: Owen DeLong <owen@delong.com> In-Reply-To: <alpine.OSX.2.00.1101260905210.211@cust11794.lava.net> Date: Wed, 26 Jan 2011 12:39:16 -0800 To: Antonio Querubin <tony@lava.net> Cc: nanog@nanog.org Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org On Jan 26, 2011, at 11:17 AM, Antonio Querubin wrote: > On Wed, 26 Jan 2011, Charles N Wyble wrote: >=20 >> Do I just need to assign ip addresses to my servers, add AAAA records = to >> my DNS server and that's it? I'm running PowerDNS for DNS, Apache for >> WWW. Postfix for SMTP. >=20 > Best to remove IP version dependencies in your configs. >=20 > If you are using name-based virtual hosting in Apache, convert: >=20 > Listen a.b.c.d:80 -> Listen 80 > <Virtualhost a.b.c.d:80> -> <Virtualhost *:80> >=20 That only works if you have only one address on the machine and. If you have addresses that aren't intended for name-based-site-A but do terminate SSL connections to sites B, C, and D, then you probably don't want to use * for site A. > Use hard-coded IP addresses only where required for stuff like = SSL-enabled webhosts. >=20 Depends on the complexity of your environment. In a more complex = configuration you can actually save yourself a lot of trouble and confusion later by = using a construct like this: Listen 192.159.10.7:80 Listen [2620:0:930::dead:beef:cafe]:80 Listen [2620:0:930::400:7]:80 <VirtualHost 192.159.10.7:80 [2620:0:930::400:7]:80 = [2620:0:930::dead:beef:cafe] :80> ServerName www.delong.com ... YMMV, but, that's working reliably in my environment for: [root@owen conf]# host www.delong.com www.delong.com has address 192.159.10.7 www.delong.com has IPv6 address 2620:0:930::400:7 (The dead:beef:cafe address isn't currently in the AAAAs that are = publicly visible because it's used for testing specialized testing from different DNS views.) The machine in question has a number of IPv4 and IPv6 addresses many of which terminate HTTP/HTTPs connections, some of which do not. Owen
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