Hi,
>>>>> On Wed, 22 Aug 2012 04:06:46 +0400
>>>>> Andrey Chernov <a...@freebsd.org> said:
ache> BTW, I notice that link-local router address behavior is
ache> strange and inconsistant for both 'host -6' and 'dig -6' commands.
ache> host -6 example.com fe80::<rest of router address>
ache> dig -6 @fe80::<rest of router address> example.com
ache> both hangs, but in the same time
ache> host -6 example.com fe80::<rest of router address>%<iface>
ache> dig -6 @fe80::<rest of router address>%<iface> example.com
ache> works!
ache> host -6 example.com fe80::<rest of router address>%1
ache> dig -6 #fe80::<rest of router address>%1 example.com
ache> works too. Not understanding addresses without %<iface> or %1 looks like
ache> routing problems, but I don't know where to fix it.
A link-local address has a scope; an interface here. You cannot omit
it on FreeBSD by default. To be able to omit it, specify something
like ipv6_default_interface="em0" in your /etc/rc.conf.
ache> So, I try to use
ache> nameserver fe80::<rest of router address>%<iface> (or with %1 suffix)
ache> in my resolv.conf, as result
ache> host -6 example.com
ache> dig -6 example.com
ache> (without NS specified) both hangs despite they working when exact the
same
ache> NS address is given in their command lines.
Our stub resolver in libc should work with a link-local address as
nameserver. However, host(1) and dig(1) don't use the stub resolver
in libc, and use its own resolver. I suspect host(1) and dig(1) have
some problem in handling a link-local address.
In anyway, I don't recommend to use a link-local address for DNS.
Sincerely,
--
Hajimu UMEMOTO
u...@mahoroba.org ume@{,jp.}FreeBSD.org
http://www.mahoroba.org/~ume/
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