[Yum] PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"

[Nicolas BOSC]

ping6 mirrorlist.centos.org returns "connect: the network is not  
accessible", which confirm what you said.

If you right and curl is indeed broken, how a such thing happened???  
Should I reinstall curl?

Thank you

Nicolas


Le Thu, 24 Oct 2013 10:12:11 +0200, Zdenek Pavlas <zpavlas at redhat.com> a  
écrit:

>> Indeed the "IP" on the search line is not correct.
>>
>> If I add the 192, nothing changes. If I remove this line, it comes back
>> after I reboot. Even if I remove Networkmanager, it comes back...
>
> Likely you've replied "192.168.11.218" to the host.domain prompt,
> so your domain is assumed to be 168.11.218 and the hostname is 192.
>
> However, this should not be a problem when resolving fully qualified
> hostnames. The real problem is that curl defaults to using ipv6 address
> of mirrorlist.centos.org, but ipv6 packets can't reach the destination.
>
> Try "ping6 mirrorlist.centos.org", it probably won't work.
>
> IMO this is a bug in curl.
>
> 1) The fact that host has an ipv6 address does not imply it's reachable.
>    Curl should not try to use ipv6 unless you explicitly ask for that.
>
> 2) The fallback to ipv4 is probably broken in curl.
>
>   DOCS: "curl will connect to a server with IPv6 when a host lookup
>   returns an IPv6 address and fall back to IPv4 if the connection fails."
>
>   It apparently does not..
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