[gentoo-user] Managing rDNS with BIND

[gentoo-user] Managing rDNS with BIND

[Carlos Sura]

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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.

Any help?

Thanks.
-- 
Carlos Sura.-
www.carlossura.com

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Re: [gentoo-user] Managing rDNS with BIND

[Duane Hill]

On Saturday, January 07, 2012 at 15:45:44 UTC, carlos.sura1@googlemail.com confabulated:

> 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.

> Any help?

The  setting  up  rDNS  on  the one server would only be for that local
server.   All   other  servers that are not using the one local server
for  DNS resolution would look to your provider. You would either have
to 1) get your provider to delegate rDNS to you, 2) duplicate the rDNS
setup   on  the  additional  servers, or 3) point DNS (resolv.conf) to
the one server that is working locally.

Without   your   provider   delegating   rDNS to you, the "rest of the
world" would still be looking to your provider for rDNS, regardless.

-- 
If at first you don't succeed...
...so much for skydiving.

Re: [gentoo-user] Managing rDNS with BIND

[Carlos Sura]

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On 7 January 2012 10:08, Duane Hill <duihi77@gmail.com> wrote:

> On Saturday, January 07, 2012 at 15:45:44 UTC, carlos.sura1@googlemail.comconfabulated:
>
> > 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.
>
> > Any help?
>
> The  setting  up  rDNS  on  the one server would only be for that local
> server.   All   other  servers that are not using the one local server
> for  DNS resolution would look to your provider. You would either have
> to 1) get your provider to delegate rDNS to you, 2) duplicate the rDNS
> setup   on  the  additional  servers, or 3) point DNS (resolv.conf) to
> the one server that is working locally.
>
> Without   your   provider   delegating   rDNS to you, the "rest of the
> world" would still be looking to your provider for rDNS, regardless.
>
> --
> If at first you don't succeed...
> ...so much for skydiving.
>
>
>
Hello Duane,

Thank your for answer. I just have one question: What you mean that my
provider has to delegate rDNS to me? I have the resolv.conf with my own
nameservers.

Locally it shows as I want, but not on the Internet. What would I need to
ask to my provider?

Thanks!


-- 
Carlos Sura.-
www.carlossura.com

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Re: [gentoo-user] Managing rDNS with BIND

[Duane Hill]

On Saturday, January 07, 2012 at 16:15:47 UTC, carlos.sura1@googlemail.com confabulated:

> On 7 January 2012 10:08, Duane Hill <duihi77@gmail.com> wrote:

>> On Saturday, January 07, 2012 at 15:45:44 UTC, carlos.sura1@googlemail.comconfabulated:
>>
>> > 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.
>>
>> > Any help?
>>
>> The  setting  up  rDNS  on  the one server would only be for that local
>> server.   All   other  servers that are not using the one local server
>> for  DNS resolution would look to your provider. You would either have
>> to 1) get your provider to delegate rDNS to you, 2) duplicate the rDNS
>> setup   on  the  additional  servers, or 3) point DNS (resolv.conf) to
>> the one server that is working locally.
>>
>> Without   your   provider   delegating   rDNS to you, the "rest of the
>> world" would still be looking to your provider for rDNS, regardless.
>>
>> --
>> If at first you don't succeed...
>> ...so much for skydiving.
>>
>>
>>
> Hello Duane,

> Thank your for answer. I just have one question: What you mean that my
> provider has to delegate rDNS to me? I have the resolv.conf with my own
> nameservers.

> Locally it shows as I want, but not on the Internet. What would I need to
> ask to my provider?

> Thanks!

You  would  have  to find out if your provider would delegate rDNS for
the  IP  address range to you. You would have to provide them with the
name server IP addresses that would be serving rDNS. I can only assume
if  they  will not set up the rDNS for you, they may not delegate rDNS
either.

If you are trying to set up an email server and your provider will not
delegate  or  set  up the rDNS, just set up your email server to relay
outbound  messages  through  your  provider. That is exactly what I am
doing here and have been for 5+ years without any issues.

-- 
If at first you don't succeed...
...so much for skydiving.

Re: [gentoo-user] Managing rDNS with BIND

[Michael Hampicke]

> Thank your for answer. I just have one question: What you mean that my
> provider has to delegate rDNS to me? I have the resolv.conf with my own
> nameservers.
> 
> Locally it shows as I want, but not on the Internet. What would I need to
> ask to my provider?

You have to set the rdns entries on the 'authoritative name server' of
your domain (it's the nameserver that manages your domain).

Re: [gentoo-user] Managing rDNS with BIND

[Carlos Sura]

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On 7 January 2012 10:28, Duane Hill <duihi77@gmail.com> wrote:

> On Saturday, January 07, 2012 at 16:15:47 UTC, carlos.sura1@googlemail.comconfabulated:
>
> > On 7 January 2012 10:08, Duane Hill <duihi77@gmail.com> wrote:
>
> >> On Saturday, January 07, 2012 at 15:45:44 UTC,
> carlos.sura1@googlemail.comconfabulated:
> >>
> >> > 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.
> >>
> >> > Any help?
> >>
> >> The  setting  up  rDNS  on  the one server would only be for that local
> >> server.   All   other  servers that are not using the one local server
> >> for  DNS resolution would look to your provider. You would either have
> >> to 1) get your provider to delegate rDNS to you, 2) duplicate the rDNS
> >> setup   on  the  additional  servers, or 3) point DNS (resolv.conf) to
> >> the one server that is working locally.
> >>
> >> Without   your   provider   delegating   rDNS to you, the "rest of the
> >> world" would still be looking to your provider for rDNS, regardless.
> >>
> >> --
> >> If at first you don't succeed...
> >> ...so much for skydiving.
> >>
> >>
> >>
> > Hello Duane,
>
> > Thank your for answer. I just have one question: What you mean that my
> > provider has to delegate rDNS to me? I have the resolv.conf with my own
> > nameservers.
>
> > Locally it shows as I want, but not on the Internet. What would I need to
> > ask to my provider?
>
> > Thanks!
>
> You  would  have  to find out if your provider would delegate rDNS for
> the  IP  address range to you. You would have to provide them with the
> name server IP addresses that would be serving rDNS. I can only assume
> if  they  will not set up the rDNS for you, they may not delegate rDNS
> either.
>
> If you are trying to set up an email server and your provider will not
> delegate  or  set  up the rDNS, just set up your email server to relay
> outbound  messages  through  your  provider. That is exactly what I am
> doing here and have been for 5+ years without any issues.
>
> --
> If at first you don't succeed...
> ...so much for skydiving.
>
>
>
This is quite interesting. Yes, what I'm trying to set up is a email
server. But I'm not sure how to set that configuration, can you send me a
link or resource? because I'm having emails issue because rDNS.

In any case, I will do a research.

Thanks.

-- 
Carlos Sura.-
www.carlossura.com

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Re: [gentoo-user] Managing rDNS with BIND

[Carlos Sura]

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On 7 January 2012 10:30, Michael Hampicke <gentoo-user@hadt.biz> wrote:

> > Thank your for answer. I just have one question: What you mean that my
> > provider has to delegate rDNS to me? I have the resolv.conf with my own
> > nameservers.
> >
> > Locally it shows as I want, but not on the Internet. What would I need to
> > ask to my provider?
>
> You have to set the rdns entries on the 'authoritative name server' of
> your domain (it's the nameserver that manages your domain).
>
>
Well, I think I did, but it only works or shows that it's working on the
same machine. In any other machine, rDNS not working it shows my provider's
configuration.

-- 
Carlos Sura.-
www.carlossura.com

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Re: [gentoo-user] Managing rDNS with BIND

[Duane Hill]

On Saturday, January 07, 2012 at 16:30:47 UTC, gentoo-user@hadt.biz confabulated:

>> Thank your for answer. I just have one question: What you mean that my
>> provider has to delegate rDNS to me? I have the resolv.conf with my own
>> nameservers.
>> 
>> Locally it shows as I want, but not on the Internet. What would I need to
>> ask to my provider?

> You have to set the rdns entries on the 'authoritative name server' of
> your domain (it's the nameserver that manages your domain).

Not  necessarily.  The  two are completely separate zone files. Having
authority  to  provide DNS for a domain name to the Internet just sets
up the forward lookup (not the reverse IP).

For reverse  DNS you either 1) have to have been directly allocated the IP
space,  2)  been  delegated  rDNS from the upstream IP provider, or 3)
have the upstream IP provider set up the rDNS for you.

-- 
If at first you don't succeed...
...so much for skydiving.

Re: [gentoo-user] Managing rDNS with BIND

[Alan McKinnon]

On Sat, 7 Jan 2012 09:45:44 -0600
Carlos Sura <carlos.sura1@googlemail.com> 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

Re: [gentoo-user] Managing rDNS with BIND

[Carlos Sura]

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On 8 January 2012 16:02, Alan McKinnon <alan.mckinnon@gmail.com> wrote:

> On Sat, 7 Jan 2012 09:45:44 -0600
> Carlos Sura <carlos.sura1@googlemail.com> 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
>
>

Hello Alan McKinnon,

Thank you for your answer, I get you now you explained everything I needed
to know. About my ISP, they changed it for me, since I was sending a lot of
ticket support to them, because they have a poor support, I understand they
don't manage and help me with a lot of things, basically I don't need them,
the only thing I was asking for is to set the rDNS for me, hopefully they
did, cause I told them, that I really don't understand what they mean by
"do it by myself" and I was reading all BIND ebook to understad how
delegation works.

Regards

-- 
Carlos Sura.-
www.carlossura.com

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Re: [gentoo-user] Managing rDNS with BIND

[Alan McKinnon]

On Sat, 14 Jan 2012 13:35:16 -0600
Carlos Sura <carlos.sura1@googlemail.com> wrote:

> On 8 January 2012 16:02, Alan McKinnon <alan.mckinnon@gmail.com>
> wrote:
> 
> > On Sat, 7 Jan 2012 09:45:44 -0600
> > Carlos Sura <carlos.sura1@googlemail.com> 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
> >
> >
> 
> Hello Alan McKinnon,
> 
> Thank you for your answer, I get you now you explained everything I
> needed to know. About my ISP, they changed it for me, since I was
> sending a lot of ticket support to them, because they have a poor
> support, I understand they don't manage and help me with a lot of
> things, basically I don't need them, the only thing I was asking for
> is to set the rDNS for me, hopefully they did, cause I told them,
> that I really don't understand what they mean by "do it by myself"
> and I was reading all BIND ebook to understad how delegation works.
> 
> Regards
> 

Hi Carlos,

I'm glad to hear you came right.

Yes, having your ISP update their rDNS with your machine's name is the
best solution all round.


-- 
Alan McKinnnon
alan.mckinnon@gmail.com