On 2009-08-30 Konrad Rosenbaum <kon...@silmor.de> wrote: > On Sunday 30 August 2009, Andreas Metzler wrote: > > OTOH for the other setups (no remote mail, smarthost) the default > > value for the listening interfaces indeed only includes 127.0.0.1. Is > > it actually a good idea to change this? I expect that this could cause > > problems on ipv4-only hosts.
> I just tried it out on a minimal lenny installation that did not have IPv6 > pre-loaded on startup. Putting ::1 into the configuration will cause the > kernel to automatically "modprobe ipv6". I personally do not think this is > a bad thing - a lot of other packages do this anyway. > If the ipv6.ko kernel module is removed (or renamed) the exim startup does > not work if it requires IPv6. But I do not think that this is a very > realistic scenario in 2009 - we've got only 28 IPv4 A-blocks left in the > IANA pool! Hello, actually completly disabling ipv6 is probably still a smart choice at least in Europe. Getting IPv6 is still hard.[1] And having apps trying to use IPv6 just slows things down. (Just look at how complicated google does this. http://www.google.com/intl/en/ipv6/) <mode rant>No chance of IPv6 success while it is not an automatic service instead of a special (pricy) option </> ;-) > Someone who is capable of deliberately shooting himself that big > a hole into the foot, is also capable of changing the exim config - don't > you think?... ;-) Point taken. > > Do people actually run ipv6-only hosts > > (not even loopback ipv4)? Is this a usecase we should optimize for? > I don't think there are many IPv6-only hosts yet (and I don't think there > will be many before maybe 2015). My proposed setup would break with > IPv6-only hosts by the way: exim would panic because of a lack of IPv4. > What I am concerned about is dual-stack hosts with localhost pointing to ::1 > instead of or in addition to 127.0.0.1 (often this is under the control of > the DNS admin, not the host admin). Having exim listen on both makes things > run a little bit smoother, IMHO. Hm, if I have ametz...@argenau:~$ grep ^host /etc/nsswitch.conf hosts: files dns /etc/hosts should win over DNS, shouldnt it? cu andreas [1] Yes, I know about 6to4, but a) it is a slow crutch b) it does not work behind a NATing ADSL Modem/Router. -- `What a good friend you are to him, Dr. Maturin. His other friends are so grateful to you.' `I sew his ears on from time to time, sure' -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
