what's a valid domain name?
pyh at mail.nsbeta.info
pyh at mail.nsbeta.info
Tue Feb 1 01:54:16 UTC 2011
Ben Croswell writes:
> In that case technically you are creating undelegated subdomains for each
> router.
> The dot is a delimiter and can't be part of a hostname.
>
I was thinking you are wrong.
Period is somewhat permitted in a hostname.
From RFC 952
A "name" (Net, Host, Gateway, or Domain name) is a text string up
to 24 characters drawn from the alphabet (A-Z), digits (0-9), minus
sign (-), and period (.). Note that periods are only allowed when
they serve to delimit components of "domain style names".
No blank or space characters are permitted as part of a
name. No distinction is made between upper and lower case. The first
character must be an alpha character [Relaxed in RFC 1123] . The
last character must not be a minus sign or period.
regrads.
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