[dns-operations] about the underline in hostname

hua peng huapeng at arcor.de
Fri May 30 01:56:38 UTC 2014

IIRC BIND doesn't permit an A record whose label has a underscore 
included, for example, this one:

aa_bb.google.com.         300     IN      A

what RFC item is it influenced by?

> BIND does allow domain names with underscores in them. In fact SRV records use underscores so that names with those _service._proto labels can't be confused with hostnames.

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