On Tue, 2011-12-27 at 17:24:57 -0500, Wietse Venema wrote:
> ...
> After I made "inet_protocols=all" the default on your request, I
> received notice that Postfix no longer would build on freebsd.org
> "build" systems, and that it would be removed from ports. These
> build environments have IPv6 in the kernel but they have no IPv6
> interfaces. Basically, these are IPv4-only boxes with can IPv6
> configuration that violates the RFCs.
>
> These changes were made to avoid being kicked out of the ports:
>
> 20111117
>
> Workaround: don't use IPv6 at build time. File: conf/main.cf.
>
> Workaround: don't abort when IPv6 is present but busted.
> File: util/inet_proto.c.
>
> Now, I can easily remove the first workaround. But that won't
> prevent the post-install script from adding "inet_protocols=ipv4"
> to main.cf when you upgrade Postfix.
> ...
FWIW, the FreeBSD Postfix port is patched so that post-install does not
add "inet_protocols=ipv4" to main.cf during upgrades. Instead, users are
notified[1] about the recent change of defaults, and asked to append the
ipv4 line to their main.cf, if necessary.
[1] This is in ports/UPDATING, a file users consult before upgrading any
port. I elected to go this route to force users to pay attention to
this particular change.
--
Sahil Tandon
--- conf/post-install.orig 2011-10-11 20:39:19.000000000 -0400
+++ conf/post-install 2011-10-11 20:41:58.000000000 -0400
@@ -790,18 +790,6 @@
EOF
}
- # Postfix 2.9.
- # Safety net for incompatible changes in IPv6 defaults. This
- # requires that the default is "inet_protocols = ipv4" when
- # IPv6 support is not compiled in. See util/sys_defs.h.
-
- test "`$POSTCONF -dh inet_protocols`" = "ipv4" ||
- test -n "`$POSTCONF -c $config_directory -nh inet_protocols`" || {
- echo COMPATIBILITY: editing main.cf, setting inet_protocols=ipv4.
- echo Specify inet_protocols explicitly if you want to enable IPv6.
- echo In a future release IPv6 will be enabled by default.
- $POSTCONF -c $config_directory inet_protocols=ipv4 || exit 1
- }
}
# A reminder if this is the first time Postfix is being installed.
