On Mon, 27 Apr 2009, John Hardin wrote:
How about "_at_" - I think a leading and trailing underscore will be very
rare in real world domain name parts, especially as you can't register
a domain name having an underscore, and may apps will discard hostnames
with underscores as invalid.
Ever seen a MicroSoft AD "SRV" dns query? Try something like:
"_gc._tcp.Default-First-Site._sites.win.ccad.uiowa.edu."
Havn't seen one that contains leading and trailing underscores, -yet-.
Will the DNS server choke on that? Remember, it only has to be valid
within the scope of a DNS query.
All modern DNS servers will handle it. One of the newer RFCs for
DNS pretty much throws things wide open (can you say UTF-8 and
internationalization?).
--
Dave Funk University of Iowa
<dbfunk (at) engineering.uiowa.edu> College of Engineering
319/335-5751 FAX: 319/384-0549 1256 Seamans Center
Sys_admin/Postmaster/cell_admin Iowa City, IA 52242-1527
#include <std_disclaimer.h>
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