Hi Andy,

To be clear - about half of the sites we've encountered didn't have DNS configured compatible with the client. Further, it's not really DNS - for example, if there's an IPv4 address in /etc/hosts, glibc will skip any DNS lookups.

What about the other half of the fix: have the client detect when the XrdNetUtils network stack determination is wrong, in simple cases. For example, if XrdNetUtils concludes there is no IPv6 support but we've connected to the redirector via IPv6...

Brian

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