Hi,

While the discussion of DNS configuration is nice, I can we steer back to the underlying cause:

  1. Old versions of the Xrootd client are known to log in to a server via IPv6 but set dual-stack:false despite the worker node actually being dual-stack. This has already been fixed in newer Xrootd versions.
  2. Current server versions adhere to protocol spec and trust the client's setting of the dual-stack flag.
  3. We would like the ability to break the protocol spec and have the server always treat things as if IPv6 client's dual-stack flag was always set to true.

As far as I can tell, neither DNS configuration nor server version comes into play here.

Brian

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