nanog mailing list archives
Re: Reverse DNS RFCs and Recommendations
From: William Herrin <bill () herrin us>
Date: Wed, 30 Oct 2013 18:27:24 -0400
On Wed, Oct 30, 2013 at 5:33 PM, Nolan Rollo <nrollo () kw-corp com> wrote:
So in the four examples below, 3 of them preface the IP with an alpha character. Charter however, starts the rDNS off with a number. I'm not arguing with anyone but what potential problems could that cause with DNS?
Once upon a time there were buggy software implementations which looked at the first character of the "name" to decide whether it was a host name or an IP address. How many of them still exist? Not many would be my guess.
3. Start each section of the name with a letter, not a number or hyphen.
The question I would ask myself is: will I recognize a gain from putting a digit first in the name instead of a letter? If yes, it's probably enough of an advantage to not worry about the old implementations. If no (and it surely seems to be "no" in Nolan's case) then keep to the conventions that work even with the ancient buggy crap. Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- Re: Reverse DNS RFCs and Recommendations, (continued)
- Re: Reverse DNS RFCs and Recommendations Dave Crocker (Oct 31)
- Re: Reverse DNS RFCs and Recommendations Scott Howard (Oct 30)
- Re: Reverse DNS RFCs and Recommendations Tim Franklin (Oct 30)
- Re: Reverse DNS RFCs and Recommendations John Miller (Oct 30)
- Re: Reverse DNS RFCs and Recommendations William Herrin (Oct 30)
- Re: Reverse DNS RFCs and Recommendations Andrew Sullivan (Oct 30)
- RE: Reverse DNS RFCs and Recommendations Nolan Rollo (Oct 30)
- Re: Reverse DNS RFCs and Recommendations Joe Abley (Oct 30)
- Re: Reverse DNS RFCs and Recommendations Scott Howard (Oct 30)
- Re: Reverse DNS RFCs and Recommendations Mark Andrews (Oct 30)
- Re: Reverse DNS RFCs and Recommendations William Herrin (Oct 30)
- Re: Reverse DNS RFCs and Recommendations Valdis . Kletnieks (Oct 30)
- Re: Reverse DNS RFCs and Recommendations Barry Shein (Oct 30)
- Re: Reverse DNS RFCs and Recommendations Matthias Leisi (Oct 30)
- Re: Reverse DNS RFCs and Recommendations John Levine (Oct 31)
- RE: Reverse DNS RFCs and Recommendations Tony Hain (Oct 31)
- Re: Reverse DNS RFCs and Recommendations John Levine (Oct 31)
- Re: Reverse DNS RFCs and Recommendations Scott Howard (Oct 31)