Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Help me setting up dns and understanding it.
Top Forums UNIX for Dummies Questions & Answers Help me setting up dns and understanding it. Post 302913396 by ankurk on Saturday 16th of August 2014 01:33:58 AM
Old 08-16-2014
Help me setting up dns and understanding it.
Hi

I need to set up a dns server for Oracle 11g rac setup. I got some files (copied from friend) named.conf and related files in /var/named , i was told that this would work fine. But i am getting some issues. I am attaching the files here.

The problem is

Code:
dig oralab-scan.oralab.example.com

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 <<>> oralab-scan.oralab.example.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 17130
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;oralab-scan.oralab.example.com.        IN      A

;; Query time: 2 msec
;; SERVER: 10.0.2.2#53(10.0.2.2)
;; WHEN: Sat Aug 16 10:55:53 2014
;; MSG SIZE  rcvd: 48

[root@grid named]# nslookup oralab-scan.oralab.example.com
Server:         10.0.2.2
Address:        10.0.2.2#53

** server can't find oralab-scan.oralab.example.com.example.com: REFUSED

Code:
[root@grid named]# more /etc/named.conf
//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//

options {
        directory "/var/named";     // Base directory for named
        allow-transfer {"none";};   // Slave serves that can pull zone transfer. Ban everyone by default
        };
zone "2.168.192.IN-ADDR.ARPA." IN { // Reverse zone.
        type master;
        notify no;
        file "192.168.2.db";
};

zone "2.10.10.IN-ADDR.ARPA." IN { // Reverse zone.
        type master;
        notify no;
        file "10.10.2.db";
};

zone "example.com." IN {
        type master;
        notify no;
        file "example.com.db";
};

zone "." IN {
type hint;
file "/dev/null";
};

Code:
[root@grid named]# pwd
/var/named
[root@grid named]# cat 192.168.2.db
$TTL 1H
@       IN      SOA     grid  root.example.com.  (
                        2009011201      ; serial (todays date + todays serial #)
                        3H              ; refresh 3 hours
                        1H              ; retry 1 hour
                        1W              ; expire 1 week
                        1D )            ; minimum 24 hour
;
              NS        grid.example.com.
80            PTR       grid.example.com.
90            PTR       oralab-gns.example.com. ; reverse mapping for GNS

Last edited by Don Cragun; 08-16-2014 at 05:13 AM.. Reason: Add additional CODE tags.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Setting Up Dns Server In Bsd

I just learning BSD So how would you go about setting up a DNS server please explain like A,B,C I am a new very new UNIX users so any help would be great thanks :( :confused: (1 Reply)
Discussion started by: BSD_NEWUSER
1 Replies

2. Linux

setting primary dns

Hi, I am running Fedora 7. I seem to remember there being a command to determine the primary dns. Can anyone help me find out what it is? Thanks! (2 Replies)
Discussion started by: user23
2 Replies

3. Solaris

Setting up local DNS Server

Hi , Could some one please share some docs or steps to set up solaris box as a local DNS . Thx (1 Reply)
Discussion started by: skamal4u
1 Replies

4. UNIX for Advanced & Expert Users

DNS server choice: Windows DNS vs Linux BIND

I'd like to get some opnions on choosing DNS server: Windows DNS vs Linux BIND comparrsion: 1) managment, easy of use 2) Security 3) features 4) peformance 5) ?? I personally prefer Windows DNS server for management, it supports GUI and command line. But I am not sure about security... (2 Replies)
Discussion started by: honglus
2 Replies

5. Red Hat

dhcp not setting dns and changing to garbage

I have 2 problems. Dhcp is not setting dns and after I manually set my dns it changes to garbage. I literally just used command to set dns which is a good copy of resolv.conf: sudo cp /home/bob/Desktop/scripts_9-12-2011/resolv.conf /etc/resolv.confHere is a copy of my resolv.conf. #... (5 Replies)
Discussion started by: cokedude
5 Replies

6. Red Hat

DHCP & DNS - Clients get IP but don't register in DNS

I am trying to setup a CentOS 6.2 server that will be doing 3 things DHCP, DNS & Samba for a very small office (2 users). The idea being this will replace a very old Win2k server. The users are all windows based clients so only the server will be Linux based. I've installed CentOS 6.2 with... (4 Replies)
Discussion started by: FireBIade
4 Replies

7. Linux

Setting up slave DNS?

can someone point me in the right direction im trying to setup a Slave dns server this is my named.conf file zone "website1.org" { type slave; file"mydb-for-website1-org"; notify NO; };and this is my var/named/mydb-for-website1-org $TTL 3D @ IN SOA ... (1 Reply)
Discussion started by: gangsta
1 Replies

8. Shell Programming and Scripting

Understanding PATH variable setting?

I do know how we set the PATH variable- export PATH=$JAVA_HOME/bin:$PATH I'm trying to understand why we have written :$PATH in the end above statement. What is it's meaning? (2 Replies)
Discussion started by: boy18nj
2 Replies

9. Ubuntu

Network Manager not setting correct DNS servers

Since a few weeks i use Ubuntu 16 on my laptop: # uname -a Linux xxxx 4.8.0-52-generic #55~16.04.1-Ubuntu SMP Fri Apr 28 14:36:29 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux Because i want to use a custom name server i set the properties in the "Edit Connections" dialogue to the following: ... (2 Replies)
Discussion started by: bakunin
2 Replies

10. Solaris

DNS client added to DNS server but not working

Hi, We have built a new server (RHEL VM)and added that IP/hostname into dns zone configs file on DNS server (Solaris 10). Reloaded the configuration using and added nameserver into resolv.conf on client. But when I am trying nslookup, its not getting resolved. The nameserver is not able to... (8 Replies)
Discussion started by: snchaudhari2
8 Replies

LEARN ABOUT CENTOS

ipa-replica-install

ipa-replica-install(1)						 IPA Manual Pages					    ipa-replica-install(1)

NAME

       ipa-replica-install - Create an IPA replica

SYNOPSIS

       ipa-replica-install [OPTION]... replica_file

DESCRIPTION

       Configures a new IPA server that is a replica of the server that generated it. Once it has been created it is an exact copy of the original
       IPA server and is an equal master. Changes made to any master are automatically replicated to other masters.

       The replica_file is created using the ipa-replica-prepare utility.

       If the installation fails you may need to run ipa-server-install --uninstall before running ipa-replica-install again.

       The installation will fail if the host you are installing the replica on exists as a host in  IPA  or  an  existing  replication  agreement
       exists (for example, from a previously failed installation).

       A replica should only be installed on the same or higher version of IPA on the remote system.

OPTIONS

   BASIC OPTIONS
       --setup-ca
	      Install and configure a CA on this replica. If a CA is not configured then certificate operations will be forwarded to a master with
	      a CA installed.

       --ip-address=IP_ADDRESS
	      The IP address of this server. If this address does not match the address the host resolves to and --setup-dns is not  selected  the
	      installation will fail. If the server hostname is not resolvable, a record for the hostname and IP_ADDRESS is added to /etc/hosts.

       -p DM_PASSWORD, --password=DM_PASSWORD
	      Directory Manager (existing master) password

       -w ADMIN_PASSWORD, --admin-password=ADMIN_PASSWORD
	      Admin user Kerberos password used for connection check

       --mkhomedir
	      Create home directories for users on their first login

       -N, --no-ntp
	      Do not configure NTP

       --no-ui-redirect
	      Do not automatically redirect to the Web UI.

       --ssh-trust-dns
	      Configure OpenSSH client to trust DNS SSHFP records.

       --no-ssh
	      Do not configure OpenSSH client.

       --no-sshd
	      Do not configure OpenSSH server.

       --skip-conncheck
	      Skip connection check to remote master

       -d, --debug
	      Enable debug logging when more verbose output is needed

       -U, --unattended
	      An unattended installation that will never prompt for user input

   CERTIFICATE SYSTEM OPTIONS
       --skip-schema-check
	      Skip check for updated CA DS schema on the remote master

   DNS OPTIONS
       --setup-dns
	      Generate	a  DNS	zone  if  it does not exist already and configure the DNS server.  This option requires that you either specify at
	      least one DNS forwarder through the --forwarder option or use the --no-forwarders option.

       --forwarder=IP_ADDRESS
	      Add a DNS forwarder to the DNS configuration. You can use this option multiple times to specify more forwarders, but  at	least  one
	      must be provided, unless the --no-forwarders option is specified.

       --no-forwarders
	      Do not add any DNS forwarders. Root DNS servers will be used instead.

       --reverse-zone=REVERSE_ZONE
	      The reverse DNS zone to use

       --no-reverse
	      Do not create new reverse DNS zone. If a reverse DNS zone already exists for the subnet, it will be used.

       --no-host-dns
	      Do not use DNS for hostname lookup during installation

       --no-dns-sshfp
	      Do not automatically create DNS SSHFP records.

EXIT STATUS

       0 if the command was successful

       1 if an error occurred

       3 if the host exists in the IPA server or a replication agreement to the remote master already exists

IPA
								    May 16 2012 					    ipa-replica-install(1)
All times are GMT -4. The time now is 02:29 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy