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*