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Thread: Howto: Setup a DNS server with bind

  1. #11
    Join Date
    Aug 2006
    Beans
    167

    Re: Howto: Setup a DNS server with bind

    in reference to
    Code:
    # This is the zone definition. replace example.com with your domain name
    zone "example.com" {
            type master;
            file "/etc/bind/zones/example.com.db";
            };
    
    # This is the zone definition for reverse DNS. replace 0.168.192 with your network address in reverse notation - e.g my network address is 192.168.0
    zone "0.168.192.in-addr.arpa" {
         type master;
         file "/etc/bind/zones/rev.0.168.192.in-addr.arpa";
    };
    the box ip i want visible is: 10.10.10.2, router is 10.10.10.1
    would that make my rev. 0.10.10.10????

  2. #12
    Join Date
    Jan 2006
    Location
    Mechanicsburg PA
    Beans
    68
    Distro
    Ubuntu 6.10 Edgy

    Re: Howto: Setup a DNS server with bind

    Quote Originally Posted by huggy77 View Post
    in reference to
    Code:
    # This is the zone definition. replace example.com with your domain name
    zone "example.com" {
            type master;
            file "/etc/bind/zones/example.com.db";
            };
    
    # This is the zone definition for reverse DNS. replace 0.168.192 with your network address in reverse notation - e.g my network address is 192.168.0
    zone "0.168.192.in-addr.arpa" {
         type master;
         file "/etc/bind/zones/rev.0.168.192.in-addr.arpa";
    };
    the box ip i want visible is: 10.10.10.2, router is 10.10.10.1
    would that make my rev. 0.10.10.10????
    that's correct.....you just need the network address

  3. #13
    Join Date
    Nov 2006
    Beans
    Hidden!

    Re: Howto: Setup a DNS server with bind

    what version of ubuntu has the pre configured bind files? loaded the latest and it does not. Is there a version that has bind already loaded or would I still have to load bind?

  4. #14
    Join Date
    Apr 2005
    Location
    Huntsville, AL
    Beans
    47

    Re: Howto: Setup a DNS server with bind

    I'm getting this error when trying to start Bind:

    Code:
    Nov 21 21:59:47 localhost named[10645]: starting BIND 9.3.2 -u bind
    Nov 21 21:59:47 localhost named[10645]: found 1 CPU, using 1 worker thread
    Nov 21 21:59:47 localhost named[10645]: loading configuration from '/etc/bind/named.conf'
    Nov 21 21:59:47 localhost named[10645]: /etc/bind/named.conf:55: unknown option 'forwarders'
    Nov 21 21:59:47 localhost named[10645]: loading configuration: failure
    Nov 21 21:59:47 localhost named[10645]: exiting (due to fatal error)
    Here's the forwarders part in named.conf:

    Code:
    forwarders {
      205.152.37.23;
      };
    Any idea what I'm doing wrong? I'm trying to set up an DNS server that'll act as a local cache (Bellsouth's DNS kinda sucks) and so I set up a few internal websites and servers.

    Coog

  5. #15
    Join Date
    Jan 2007
    Beans
    12

    Re: Howto: Setup a DNS server with bind

    I've just finished setting this up. When I restart the service I get this error:

    rndc: connect failed: connection refused

    Any ideas on what I might have done wrong?

  6. #16
    Join Date
    Jan 2007
    Beans
    26
    Distro
    Ubuntu 6.06 Dapper

    Re: Howto: Setup a DNS server with bind

    Just wanted to let you guys know: don't use '_' in your server names. For some reason I did this and it wasted hours to find out. Stupid... yes indeed

  7. #17
    Join Date
    Sep 2006
    Location
    Bucharest, Romania
    Beans
    42
    Distro
    Kubuntu 6.10 Edgy

    Re: Howto: Setup a DNS server with bind

    stijn_pol, underscores in host names are illegal according to RFCs (I can't remember if it was the DNS RFCs or another one, it was explained on the bind-users list). This was checked in older versions of BIND (for example 8.x); BIND 9.2 didn't perform host name checking, but the feature was reimplemented in BIND 9.3 and that's what I think bit you.

    You can work around that using the 'check-names' option, if you're *really* convinced you need underscores in your hostnames.

    For diagnosing problems in your BIND configuration, named-checkconf or named-checkzone are your friends. They are part of the BIND source package, although I don't know in which Ubuntu package they are installed.

  8. #18
    Join Date
    Jan 2007
    Beans
    Hidden!

    Re: Howto: Setup a DNS server with bind

    To get the dns to updated for dhcp clients I had to add the "allow-update" directive to the zone:

    zone "example.com" {
    type master;
    file "/etc/bind/zones/example.com.db";
    allow-update {192.168.1.0/24;};
    };

  9. #19
    Join Date
    Sep 2006
    Location
    Bucharest, Romania
    Beans
    42
    Distro
    Kubuntu 6.10 Edgy

    Re: Howto: Setup a DNS server with bind

    velorider, BIND doesn't accept zone updates by defaults, which makes sense if you think of the implications of allowing people to update your DNS and redirecting your traffic to who knows what host. Also, 'allow-update' is considered insecure in the BIND 9.3 administrator's manual (see here). The best way is to use something like TSIG. Oh, and did you say you allow DHCP clients to update the DNS? That's also not a good idea, how can you trust a client not being hacked, and wreaking havoc on your DNS namespace?

    What I'd recommend is to have the DHCP server send the DNS updates, most servers should support that.

    Also, If you're running a publicly accessible DNS server, I would suggest your configuration with http://www.dnsreport.com, especially the 'open dns server' item.

  10. #20
    Join Date
    Feb 2007
    Beans
    21

    Re: Howto: Setup a DNS server with bind

    Quote Originally Posted by hogman23 View Post
    One more step to get it to work:
    You must rename the named.conf.local to named.conf
    I want to point out that this isn't correct. The default setup is for named.conf to include named.conf.local. There should be a line at the end of your named.conf which looks like this:

    Code:
    include "/etc/bind/named.conf.local";
    For my setup, I wanted to use BIND to divert all domains ending in ".dev" to a local IP, and to act as a cache for all other requests. This is a nice easy way to set up a local testing environment. Here's how my setup looks:

    named.conf.local:
    Code:
    zone "dev" {
      type master;
      file "/etc/bind/db.dev";
    };
    
    zone "1.168.192.in-addr.arpa" {
      type master;
      file "/etc/bind/db.192.168.1";
    };
    db.dev:
    Code:
    ;
    ; BIND data file for dev sites
    ;
    $TTL    604800
    @       IN      SOA     dev. root.dev. (
                                  1         ; Serial
                             604800         ; Refresh
                              86400         ; Retry
                            2419200         ; Expire
                             604800 )       ; Negative Cache TTL
    ;
    @       IN      NS      dev.
    @       IN      A       192.168.1.10
    *.dev.  14400   IN      A       192.168.1.10
    db.192.168.1:
    Code:
    ;
    ; BIND reverse data file for dev domains
    ;
    $TTL    604800
    @       IN      SOA     dev. root.dev. (
                                  1         ; Serial
                             604800         ; Refresh
                              86400         ; Retry
                            2419200         ; Expire
                             604800 )       ; Negative Cache TTL
    ;
    @       IN      NS      dev.
    10      IN      PTR     dev.
    In this example, 192.168.1.10 is the computer hosting the ".dev" sites. I'm not an expert in this, but my setup seems to be working well. I think it's unfortunate that the syntax of these files is so obscure, compared to Apache's easy-to-read config files.

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