δΊ 2012-12-14 16:44, Stephane Bortzmeyer ει:
1) What is on the left side is not always a host name, far from it (if
you have learned in a book that DNS is here to "map host names to IP
addresses", burn the book immediately, it was written by someone who
does not know the DNS).
2) Domain names can have almost any character, and it does not depend
on the record type. If you have learned that DNS allows only LDH in
domain names, burn the book again and read instead RFC 2181, section
11.
Thanks. but,
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.
_______________________________________________
dns-operations mailing list
dns-operations@lists.dns-oarc.net
https://lists.dns-oarc.net/mailman/listinfo/dns-operations
dns-jobs mailing list
https://lists.dns-oarc.net/mailman/listinfo/dns-jobs
