--On 23. März 2016 um 15:41:25 +0100 lst_hoe02--- via Info-cyrus <info-cyrus@lists.andrew.cmu.edu> wrote:
we've been using IPv6 for a few years now, but so far we haven't used it with Cyrus. Now we want to, and I have a few questions: Is it correct that if we use host names in the listen statement and add a AAAA record to the DNS that Cyrus will automatically listen to both the IPv4 and the IPv6 address? I have manually added listen statements with literal IPv6 addresses to cyrus.conf and HUP'ed the master, but that didn't seem to work. What format do I have to use? Plain addresses (e.g. 2001:DB8::6f0:484c:df5:e8b1:28cd), in brackets like in a browser (e.g. [2001:DB8::6f0:484c:df5:e8b1:28cd]), sendmail-style (e.g. IPv6:2001:DB8::6f0:484c:df5:e8b1:28cd) or ...? Or is the problem that for changes like that I have to restart the service? Cheers SebastianHm, the man page say "bracket-enclosed IP address" but until now we have only used the port as service name "imap" e.g. listen="imap" which works fine for both IPv4 and IPv6 on a dual stack host. Do you have any special need to use the hostname/IP address and not bind to all local addresses?
Yes, I do (multi-homed system), and I have just tried it on a test system. Using literal IPv6 adresses without brackets works fine, even though it looks strange:
imapv6 cmd="imapd" listen="2001:DB8:0:6f0:21c:42ff:fe5e:202e:imap"I will now try a host name with bot A and AAAA records, but I assume that will work as well.
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