Malcolm Weir wrote: > > It seemed a reasonable conclusion because the guy was complaining about > having an "incorrectly set" RDNS, when that's a manifestly not the case.
Ray was talking about someone else. Whether that person's PTR was actually incorrect is unknown and irrelevant. :) > Indeed. Asking isn't too high a bar. However, as it happens, the vendorS > (there are two involved here) have declined. They observed that there's no > meaning to the reverse DNS, and (as I have pointed out) these days forward > and reverse DNS frequently don't match anyway. I wouldn't have said anything at all, except that I thought I'd clarify that the plugin that he's using doesn't check for matching PTR and A records in DNS. Beyond that, when you say "forward and reverse" frequently don't match, I think you're confused about what happens with PTR matching lookups. I'm not aware of any software or services that do an A (or AAAA) lookup and then check the PTR to see if it matches. Clearly, this would rarely be the case and not very useful. It could also only be done on *outgoing* connections, not on connections accepted by a server (like Ray's). Instead, some servers will do a PTR lookup on the IP address that established the connection that they've accepted, and then do an A or AAAA lookup on that name to see if it matches. This will virtually always be the case, and many programs consider it a serious problem if they don't. If your PTR doesn't match the A or AAAA, you're probably trying to forge your identity. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
