On Sat, 7 Jan 2012 09:45:44 -0600 Carlos Sura <[email protected]> wrote:
> Hello mates, > > I have a problem, my provider does not want to set rDNS to my IP's > since I have 5 IP's rotating for my server, I don't know why. So he > told me I can do this manually. > > So I've added this as a master zone: > $ttl 38400 > 80.236.109.in-addr.arpa. IN SOA dominio.dominio.com. > abuse.dominio.com. (notice that last digits are miss) > 1325905990 > 10800 > 3600 > 604800 > 38400 ) > 80.236.109.in-addr.arpa. IN NS dominio.dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR mail.dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR ns1.dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR mail.dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR ns2.dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR mail.dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR mail.dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR dominio.com. > xx.xx.xxx.xxx.in-addr.arpa. IN PTR mail.dominio.com. > > > But it does not reflect any change in any machine, just in the local > machine I get the answer, when I try in any other machine, it still > showing me the rDNS of my provider. The reason is quite simple and most sane ISPs will do it that way. rDNS is NOT your A records in reverse, and you have no right of access to the zone. in-addr.arpa serves an entirely different purpose, it documents the layout of the ISPs address space. Your 5 IPs have not been delegated to you and you do not own them per whois, they still belong to your ISP and are merely recorded in the ISP record as assigned for your use. Therefore the ISP will use their own documentation standards to determine what is in the rDNS zone. Additionally, delegating out a /29 is a gigantic pain in the arse and leads to an unmaintainable mess in very short order (so says the poor sucker that's had to fix it...). At work we never sub-delegate out rDNS to customers; but we do do it for downstream re-sellers as they are ISPs in the in own right. So your ISP is quite correct in what they are saying. However, I would like to see a clarification of what your support contact means when he says "do it manually" - that doesn't make any sense -- Alan McKinnon
