nanog mailing list archives
Re: comcast ipv6 PTR
From: Barry Shein <bzs () world std com>
Date: Wed, 9 Oct 2013 21:11:43 -0400
On October 9, 2013 at 11:49 cma () cmadams net (Chris Adams) wrote:
Once upon a time, Robert Webb <rwebb () ropeguru com> said:But how would thet differ from the IPv4 address space which has PTR records for all their IP's? Just the shear number they would have to deal with in the IPv6 space?Oh, are you looking for auto-generated reverse for every address? That's not going to happen for IPv6 (and it turns out that it wasn't really a good idea for IPv4). There's no reason to have reverse DNS unless it has meaning, and "12-34-56-78.rev.domain.net" isn't really all that useful.
It's very useful for blocking spammers and other miscreants -- no reason at all to accept SMTP connections from troublesome *.rev.domain.net at all, no matter what the preceding NNN-NNN-NNN-NNN is. Perhaps not their problem, but it is useful! -- -Barry Shein The World | bzs () TheWorld com | http://www.TheWorld.com Purveyors to the Trade | Voice: 800-THE-WRLD | Dial-Up: US, PR, Canada Software Tool & Die | Public Access Internet | SINCE 1989 *oo*
Current thread:
- Re: comcast ipv6 PTR, (continued)
- Re: comcast ipv6 PTR Chris Adams (Oct 09)
- Re: comcast ipv6 PTR Robert Webb (Oct 09)
- Re: comcast ipv6 PTR Chris Adams (Oct 09)
- Re: comcast ipv6 PTR Paul Ferguson (Oct 09)
- Re: comcast ipv6 PTR Chris Adams (Oct 09)
- Re: comcast ipv6 PTR Livingood, Jason (Oct 09)
- Re: comcast ipv6 PTR Blair Trosper (Oct 09)
- Re: comcast ipv6 PTR Chris Adams (Oct 09)
- Re: comcast ipv6 PTR Joe Abley (Oct 09)
- Re: comcast ipv6 PTR John Levine (Oct 09)
- Re: comcast ipv6 PTR Robert Webb (Oct 09)
- Re: comcast ipv6 PTR Chris Adams (Oct 09)
- Re: comcast ipv6 PTR Barry Shein (Oct 09)
- Re: comcast ipv6 PTR Chris Adams (Oct 09)
- Re: comcast ipv6 PTR Barry Shein (Oct 09)
- Re: comcast ipv6 PTR Lee Howard (Oct 14)
- Re: comcast ipv6 PTR Barry Shein (Oct 14)
- Re: comcast ipv6 PTR Franck Martin (Oct 14)
- Re: comcast ipv6 PTR Paul Ferguson (Oct 14)
- Re: comcast ipv6 PTR Barry Shein (Oct 14)
- Re: comcast ipv6 PTR John Levine (Oct 14)
- Re: comcast ipv6 PTR Blair Trosper (Oct 14)
- Re: comcast ipv6 PTR Chris Adams (Oct 15)