Subject: [Sip] Legality of domain names in DNS records

From: "Baniel Uri-CUB001" <[email-masked]>
Date: Wed, 9 May 2007 11:28:47 -0400

RFC 1035 limits the Domain name field of DNS records to letters, digits
and '-' signs. Some DNS records however (such as SRV records) use
additional characters, e.g. '_' (_sip_udp.someschool.edu).

What is the legality of using additional characters for domain names in
NAPTR records? (e.g. '@', ':').
Is there any RFC or draft, which supports that?

-uri

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