Potential pitfalls in DNS handling
Posted Nov 15, 2012 18:14 UTC (Thu) by paulj
In reply to: Potential pitfalls in DNS handling
Parent article: Potential pitfalls in DNS handling
Anything is allowed in DNS labels? Was that always the case, because RFC1035 says this in section 2.3.1 on "Preferred name syntax" - on names in DNS generally:
"Note that while upper and lower case letters are allowed in domain
names, no significance is attached to the case. That is, two names with
the same spelling but different case are to be treated as if identical.
The labels must follow the rules for ARPANET host names. They must
start with a letter, end with a letter or digit, and have as interior
characters only letters, digits, and hyphen. There are also some
restrictions on the length. Labels must be 63 characters or less."
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