> On Jan 15, 2009, at 6:33 AM, Halassy Zoltán wrote: > >I don't want to break forward <-> reverse mapping. > > > >www.example.com. A 1.2.3.4 > >mail.example.com. A 1.2.3.4
> >4.3.2.1.in-addr.arpa. PTR www.example.com. > >4.3.2.1.in-addr.arpa. PTR mail.example.com. > >Would this one break anything? Or anyone else have a better tip how > >could i handle this situation? Multiple PTRs in this case is really > >an issue? > On 15.01.09 10:19, Chris Buxton wrote: > Yes, it is an issue. Remove this record: > > 4.3.2.1.in-addr.arpa. PTR www.example.com. > > Your web server doesn't need a PTR record. > >The main thing i don't want to break forward <-> reverse symmetry > >cause there are some sanity checks about this (like in spamfiltering). > > Right, your mail server ought to have a PTR record. Your web server, > however, does not need it. Actually, it doesn't matter which PTR record will remain, unless there will be any SPF record pointing to it. And even a mail server does not need PTR record, if it only accepts mail, but does not send. The valid PTR is important when sending mail - many servers will refuse connections from IP's without valid PTR and A records. The contents of the record is not that much important (unless using SPF), although some servers refuse mail from generic-looking names (e.g. a-b-c-d.anything.example) -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. How does cat play with mouse? cat /dev/mouse _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
