Date: Wed, 23 Jan 2002 16:48:29 +0900 From: Hajimu UMEMOTO <ume@mahoroba.org> To: Edwin Groothuis <edwin@mavetju.org> Cc: freebsd-ports@freebsd.org Subject: Re: IPv6 for ports, automaticly enable it or not? Message-ID: <yged701wlrm.wl@mille.mahoroba.org> In-Reply-To: <20020123163021.A97184@k7.mavetju.org> References: <20020123163021.A97184@k7.mavetju.org>
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Hi,
>>>>> On Wed, 23 Jan 2002 16:30:22 +1100
>>>>> Edwin Groothuis <edwin@mavetju.org> said:
edwin> Why isn't ipv6 automaticly enabled in Apache if OSVERSION > 400000 ?
edwin> Is there still a fear of IPv6 regarding these things?
There are some issue within application level. Since, internal API of
original Apache is hardly depend on IPv4, IPv6 patch may break 3rd
party module.
Since Mozilla's IPv6 support uses IPv4-mapped IPv6 address, it
requires IPv6 capability in kernel side even if you don't use IPv6 at
all. So, if you enable IPv6 support, Mozilla doesn't work on IPv4
only kernel. And, even if you don't want to enable IPv4-mapped IPv6
address, you must enable IPv4-mapped IPv6 address to see IPv4 only
sites.
Further, when IPv6 connection attempt is fail, Mozilla doesn't try
IPv4. This means that you cannot see sites that has AAAA RR but IPv6
service is not available. Or, if you don't have connection to 6bone,
you cannot see sites that has AAAA RR at all.
This is why there are two ports.
In another issue, there may be some delay between new release and IPv6
patch is out. Someone may don't like this delay. Recentry, ftp/wget
was divided into ftp/wget+ipv6 because of this issue.
--
Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan
ume@mahoroba.org ume@bisd.hitachi.co.jp ume@{,jp.}FreeBSD.org
http://www.imasy.org/~ume/
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