Arch Linux

rossboulet

Member

Registered: 2015-01-23

Posts: 35

postfix ipv4 only

I tried to search to see if this has been asked before, but there were so many results and I couldn't find a way to filter down to my question, so I apologize if this has been asked before.

I noticed when I upgrade postfix, the main.cf.pacnew file contains a line:

inet_protocols ipv4

But in the upstream HISTORY file I find this from 2011:

20110914

        Incompatibility: the default inet_protocols value is now
        "all" instead of "ipv4", meaning use both IPv4 and IPv6.
        As a compatibility workaround for sites without global IPv6
        connectivity, the commands "make upgrade" and "postfix
        upgrade-configuration" append "inet_protocols = ipv4" to
        main.cf when no explicit setting is present.  This compatibility
        workaround will be phased out in a future release.  Files:
        util/sys_defs.h, conf/post-install, proto/postconf.proto.

        Incompatibility: the default smtp_address_preference value
        is now "any" instead of "ipv6", meaning choose randomly
        between IPv6 and IPv4.  With this the Postfix SMTP client
        will have more success delivering mail to sites that have
        problematic IPv6 configurations.  Files: global/mail_params.h,
        proto/postconf.proto.

1) Is there something about the way the package is built that keeps trying to restrict postfix to IPv4 only?
2) Is there another reason this limitation is there?
3) Should I just keep ignoring this when I upgrade each time?
4) Would specifying "inet_protocols = all" in my main.cf keep the ipv4 from being added each upgrade?

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I really hate this damn machine,
I wish that they would sell it.
It never does just what I want,
But only what I tell it.    -Anonymous