[CentOS] /etc/gai.conf fails to prefer IPv4 over IPv6 for NFS
Gordon Messmer
gordon.messmer at gmail.com
Fri Jun 8 19:25:19 UTC 2018
On 06/08/2018 10:42 AM, Steve Rikli wrote:
> I found posts from others in a similar situation, and proposed solutions
> included modifying /etc/gai.conf to use:
>
> precedence ::ffff:0:0/96 100
>
From my reading of that file, you'd need to uncomment all of the
default precedence lines, and modify the last one. You couldn't use
that one line, alone. It's hard to tell if that's what you did.
/etc/gai.conf would contain:
precedence ::1/128 50
precedence ::/0 40
precedence 2002::/16 30
precedence ::/96 20
precedence ::ffff:0:0/96 100
...also of note is that gai.conf should only affect the getaddrinfo()
API. If the client is using an older API like gethostbyname(), it won't
order DNS results correctly.
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