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I can't properly resolve my reverse name. In my configs, I replaced my IP address by X1.X2.X3.X4, and my domain name by domainname. I have been following this tutorial, in which it first resolves the inverse before continue configuring.

I'm stuck in such a way that I don't know how to continue. One thing that I noticed is that he is using a local IP, and I'm using a internet IP.

Any pointers on how to debug this thing would be appreciated.

Here is my /etc/bind/named.conf.local:

logging {
    channel query.log {      
        file "/var/log/query.log"; 
        severity debug 3; 
    }; 
    category queries { query.log; }; 
};

zone "X3.X2.X1.in-addr.arpa" {
    type master;
    file "zones/ptr/X3.X2.X1.db";
};

include "/etc/bind/zones.rfc1918";

And my "/etc/bind/zones/ptr/X3.X2.X1.db";

$TTL 3D
@   IN      SOA     ns.domainname.com. admin.domainame.com. (
                1       ; Serial
                8H      ; Refresh
                2H      ; Retry
                4W      ; Expire
                1D)     ; Minimum TTL

        NS      ns.domainname.com.
49          PTR     localhost.

This is the dig output, note how it is missing the answer section.

root@hostname:/etc/bind# dig -x X1.X2.X3.X4 @localhost

; <<>> DiG 9.8.1-P1 <<>> -x X1.X2.X3.X4 @localhost
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 47451
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;X4.X3.X2.X1.in-addr.arpa.  IN  PTR

;; Query time: 0 msec
;; SERVER: ::1#53(::1)
;; WHEN: Thu Mar 27 18:26:06 2014
;; MSG SIZE  rcvd: 44

On the query.log, I have the following:

client ::1#49304: query: X4.X3.X2.X1.in-addr.arpa IN PTR + (::1)
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9
  • You got a SERVFAIL, which probably means there's something useful in one of bind's logs. Could you find it and add it to your question? – Flup Mar 27 '14 at 14:37
  • @fotanus Did you restart named? Please provide log output as well, – alexus Mar 27 '14 at 14:38
  • @Flup I'm using ubuntu 12.04 and nothing poped up on syslog - where can I find the bind log? greping by zone on /var/log only returns daemon and syslog – fotanus Mar 27 '14 at 14:41
  • Look for a logging section in your named.conf (or named.conf.local) or, failing that, try in /var/log/named. – Flup Mar 27 '14 at 14:43
  • @Flup I edited the question adding how I add the log on named.conf.local, and the output on the log file – fotanus Mar 27 '14 at 14:55
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The problem on my case is that I couldn't have a relative path on named.conf.local. I needed to be a full path.

So changing

file "zones/ptr/X3.X2.X1.db";

By

file "/etc/bind/zones/ptr/X3.X2.X1.db";

Make it work.

Special thanks to @WumpusQ.Wumbley comment, which make me look on syslogd and see the error message that my file was not found.

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5
  • 1
    Relative paths are legal, but they must be relative to the directory statement listed in the global options {}; block. (FYI: situations such as this are we encourage posting the full configuration, not the most relevant snippets) – Andrew B Mar 27 '14 at 21:26
  • @AndrewB That was actually my full named.conf.local, the other files (including the one that is included on it) are standard ubuntu ones. Thanks for the pointer about the correct option! – fotanus Mar 27 '14 at 21:54
  • Which is fine, until you factor in that we're not askubuntu. :) We've got a number of DNS experts here, but you're limiting yourself to a fraction of the exposure by omitting a stock distro config. – Andrew B Mar 27 '14 at 21:56
  • @AndrewB You are right, sorry for posting in the wrong place. As you can see, I use mainly stackoverflow. Please feel free to move to askubuntu if you, that uses this SE site way more than me, feel like the right thing. – fotanus Mar 28 '14 at 2:16
  • Oh, no, I'm not saying that at all. It was fine for SF, but if you're gonna use SF, you can't make the same assumptions as that site. :) – Andrew B Mar 28 '14 at 2:17
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First,

named-checkconf /etc/named.conf

Then, if that passes, restart named.

Do a dig -x X1.X2.X3.X4 @localhost

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  • Hello, thanks for the answer. I don't have a /etc/named.conf file. Running it on /etc/bind/named.conf and it don't find problems. Restarting the server and running the dig returns what I wrote on my question. – fotanus Mar 27 '14 at 14:57

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