I've a host on the network called "GC100_000C1E00AC3F_GlobalCache", and
I'm getting interesting behaviour when I try to do DNS lookups on it.
Under FreeBSD, ping fails with 'Unknown server error'(distinct from the
standard 'Unknown host'), and nslookup succeeds. OSX and Windows
machines will do a DNS lookup on it quite happily
The best explanation I can manage is that ping etc. are using different
code from nslookup, and only nslookup is allowing the underscores within
Is this behaviour by design? My understanding is that underscores are
not strictly permitted, but that most implementations choose to allow
them unless there's a specific reason not to.
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