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DNS Config problem

  • 09-11-2007 05:08PM
    #1
    Ponster
    Moderators, Recreation & Hobbies Moderators Posts: 10,912 Mod ✭✭✭✭


    Firstly forgive me for my lameness but I've been using Linux for about 3 days now and my knowledge is very, very limited :)


    My boss would like me to give an in-house demo of a program that he found on the Internet. OpenIMS runs only on linux so I :

    1. Downloaded a distro (the latest Mandriva, a random choice)
    2. Downloaded and installed all the RPM packages that OpenIMS needs
    3. Downloaded and compiled the OpenIMS package (SVN package)
    4. Installed my DNS server (bind)

    Unfortunatly when I followed the instructions to add a host (open-ims.test) to point to 127.0.0.1 it just doesn't seem to work and I don't know enough about the OS to now how to troubleshoot.

    This webpage explains the entire install process :

    http://www.openimscore.org/installation_guide

    and here is the DNS bit (at the end of that link)


    Install bind
    Locate and modify named.conf to include :
    zone "open-ims.test" IN {
	type master;
	file "pri/open-ims.dnszone";
	notify no;

    Copy open-ims.dnszone to the correct location (pri)
    Restart DNS server

    Dig command to test that it works

    Modif the rersolv.conf file to use the "open-ims.test" URL


    No matter what I try the dig command doesn't work
    [root@localhost resolvconf]# dig pcscf.open-ims.test

; <<>> DiG 9.4.1-P1 <<>> pcscf.open-ims.test
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 9988
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;pcscf.open-ims.test.           IN      A

;; AUTHORITY SECTION:
.                       6787    IN      SOA     a.root-servers.net. nstld.verisign-grs.com. 2007110801 1800 900 604800 86400

;; Query time: 2 msec
;; SERVER: 192.168.162.6#53(192.168.162.6)
;; WHEN: Fri Nov  9 16:52:26 2007
;; MSG SIZE  rcvd: 112

    and my nslookup gives me
    Server:         192.168.162.6
Address:        192.168.162.6#53

** server can't find open-ims.test.open-ims.test: NXDOMAIN



    So I presume that when I try a "ping open-ims.test" that the machine tests the hosts file first and if it doesn't find any info it looks in the named.conf where it finds a reference to a file which is loads to get the IP address associated with open-ims.test

    Is this right ?


Comments

  • #2
    Jackz
    Closed Accounts Posts: 1,506 ✭✭✭Jackz


    Look at /etc/nsswitch.conf

    It will tell you what way the things are resolved.

    Can you post the contents along with /etc/hosts and resolv.conf.


  • #3
    FruitLover
    Registered Users, Registered Users 2 Posts: 2,534 ✭✭✭FruitLover


    Is there a reason you can't just add the name to the local hosts file (/etc/hosts) instead of setting up a full-blown DNS server for a local name?

    Also, I don't think 'open-ims.test' is an FQDN, so probably won't work - are you trying to use this as the hostname, or 'pcscf.open-ims.test' as you have in your named.conf?


  • #4
    Jackz
    Closed Accounts Posts: 1,506 ✭✭✭Jackz


    Fruitlover I was thinking the same until I looked at the installation guide:

    " If you think that /etc/hosts would be enough, you are wrong as it can not help you with special DNS queries like NAPTR and SRV. "


  • #5
    FruitLover
    Registered Users, Registered Users 2 Posts: 2,534 ✭✭✭FruitLover


    Ah, OK, didn't bother reading the link - makes more sense now.

    OP, it looks like your PC is trying to query an upstream server (192.168.162.6) for the domain open-ims.test - unless this is the DNS server you're trying to set up, it won't work.

    You probably haven't edited your resolv.conf correctly, can you post it up? It should read:

    nameserver 127.0.0.1
    search open-ims.test
    domain open-ims.test

    You might also attach your named.conf for us to check

    Also: bear in mind that different distros will set up packages (e.g. bind) differently, so make sure you're putting the bind config files in the right place!


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