So here is how Net::DNS finds a DNS server.  The default is 127.0.0.1 so
if it can't find another server using any of these methods it will use
localhost.

/etc/resolv.conf
~/.resolv.conf (home dir)
./.resolv.conf (current dir)
RES_NAMESERVERS environment variable

These are all read from top to bottom, with anything found overwriting
a previously found item.  So if you have the environment variable
RES_NAMESERVERS set, it'll overwrite your normal resolv.conf value. 
You could use this variable to manually set the DNS server if all else
fails.


-- 
andyg
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