BIND on CentOS: Nameservers for two domains

[Kevin Darcy]

This is more of a registry/registrar question than a BIND/DNS question.

About the only _generic_ advice I can give you -- since you obscured the 
domain names and the relevant addresses, so I can't actually check 
anything on my own -- is to query the .eu servers directly for the 
delegation records. It's possible that what you see in their "control 
panel" doesn't match what's in the actual DNS, and what's in the actual 
DNS *matters*, as opposed to whatever crap displays or doesn't display 
in their "control panel". I've seen a lot of breakage in registrar 
"control panels" over the years, so this wouldn't surprise me in the least.

                                                                         
                                                                         
                                         - Kevin

On 9/27/2010 4:42 AM, Dotan Cohen wrote:
> Hello, I am trying to configure a single CentOS 5 machine as a server
> for two unrelated websites:
> example.eu
> example.de
>
> The server has four IP addresses assigned to it:
> 1.1.1.136
> 1.1.1.171
> 1.1.1.172
> 1.1.1.188
>
> I plan on hosting example.eu on this server with these two IP
> addresses for its name servers:
> 1.1.1.136 - ns1.example.eu
> 1.1.1.188 - ns2.example.eu
>
> Likewise, I plan on hosting example.de on this server with these two
> IP addresses for its name servers:
> 1.1.1.171 - ns1.example.de
> 1.1.1.172 - ns2.example.de
>
> These are my relevant configuration files:
>
> [root at CentOS-55-32-minimal ~]# cat /etc/named.conf
> options {
>          directory "/etc";
>          pid-file "/var/run/named/named.pid";
>          listen-on {
>                  any;
>                  };
>          };
>
> zone "." {
>          type hint;
>          file "/etc/db.cache";
>          };
>
> zone "example.de" {
>          type master;
>          file "/var/named/example.de.hosts";
>          };
> zone "example.eu" {
>          type master;
>          file "/var/named/example.eu.hosts";
>          };
>
>
>
> [root at CentOS-55-32-minimal ~]# cat /var/named/example.eu.hosts
> $ORIGIN example.eu.
> $TTL 86400
> example.eu. IN      SOA     ns1.example.eu. ns2.example.eu. (
>                          5; Serial - increment me
>                          10800
>                          3600
>                          604800
>                          38400 )
>         IN  NS    ns1.example.eu.
>         IN  NS    ns2.example.eu.
>         IN  A     1.1.1.136
>         IN  A     1.1.1.188
> www    IN  A     1.1.1.136
> www    IN  A     1.1.1.188
> ns1    IN  A     1.1.1.136
> ns2    IN  A     1.1.1.188
>
>
>
> [root at CentOS-55-32-minimal ~]# cat /var/named/example.de.hosts
> $ORIGIN example.de.
> $TTL 86400
> example.de. IN      SOA     ns1.example.de. ns2.example.de. (
>                          5; Serial - increment me
>                          10800
>                          3600
>                          604800
>                          38400 )
>         IN  NS    ns1.example.de.
>         IN  NS    ns2.example.de.
>         IN  A     1.1.1.171
>         IN  A     1.1.1.172
> www    IN  A     1.1.1.171
> www    IN  A     1.1.1.172
> ns1    IN  A     1.1.1.171
> ns2    IN  A     1.1.1.172
>
>
> In BIND and in the registrar control panel for example.eu I had set
> the IP addresses originally to 1.1.1.171 and to 1.1.1.172, however due
> to a technical problem with the .de domain I later changed the
> configuration to 1.1.1.136 and 1.1.1.188 (because it turns out that
> .de domains cannot have the two nameservers on the same C block, and
> only the 171 and 172 addresses I can swap for another address).
> However, even though the registrar control panel is set to
> ns1.example.eu as 1.1.1.136 and ns2.example.eu as 1.1.1.188, I still
> see this in whois:
>
> [root at CentOS-55-32-minimal ~]# whois example.eu
> // snip irrelevant lines
> Nameservers:
>          ns1.example.eu (1.1.1.171)
>          ns2.example.eu (1.1.1.172)
>
> I last made changes to the BIND configuration and to the registrar
> control panel on Friday, 2010-9-24 which was three days ago. Therefore
> I do not suspect that DNS propagation time is the issue here. Of
> course, I also increased the serial line in the zone files when those
> files changed. What am I missing, or what might I have done wrong?
>
> Thank you in advance.
>
>
>