nanog mailing list archives
Re: Reverse DNS RFCs and Recommendations
From: Mark Andrews <marka () isc org>
Date: Thu, 31 Oct 2013 09:21:38 +1100
In message <CACnPsNUxTa3vYQSxuTE4x9NXFm_o+2Bp7HqMBApXcm5_G5Zr2Q () mail gmail com> , Scott Howard writes:
On Wed, Oct 30, 2013 at 2:33 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? I'm also thinking of the famous www.1and1.com, where the number "1" starts off one of the sections.Using domain name parts that start with a number will likely cause issues for anyone running resolvers written in the 80's. Anyone running resolvers that are less than ~25 years will likely not have any issues. Scott
To be more precise it will cause no problems with the DNS. Some pre RFC 1123 gethostbyname implementations may reject the name but the DNS doesn't care. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka () isc org
Current thread:
- Re: Reverse DNS RFCs and Recommendations, (continued)
- Re: Reverse DNS RFCs and Recommendations Andrew Sullivan (Oct 30)
- 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)