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I setup new server on centos 5.3 and configure dns and hostnam using WHM.

I also register my new nameservers with my domain registrar with ns1.example.com and ns2.example.com.

But i am unable to ping hostname and NS. ping pc2.example.com or ping ns1.example.com

I received the below email from server.

IMPORTANT: Do not ignore this email.

Your hostname (pc2.example.com) could not be resolved to an IP
address. This means that /etc/hosts is not set up correctly, and/or
there is no dns entry for pc2.example.com. Please be sure that the
contents of /etc/hosts are configured correctly, and also that
there is a correct 'A' entry for the domain in the zone file.

Some or all of these problems can be caused by /etc/resolv.conf
being setup incorrectly. Please check that file if you believe
everything else is correct.

You may be able to automatically correct this problem by using the
'Add an A entry for your hostname' option under 'Dns Functions' in
your Web Host Manager.

When I issue the command

root@pc[~]# host pc2.example.com

I receive the below error that

Host pc2.example.com not found: 3(NXDOMAIN)

I added A entries for hostname and Nameservers but nothing replies.

Its almost more than 72 hours for setting & registering nameservers and dns configurations.


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1 Answer 1

You need to do like what has been suggested in the email you received. First, you need to make sure you have a correct A record for your hostname in your DNS server. If you have done that successfully, you probably need to look at your /etc/resolv.conf file to make sure it lists your DNS servers IPs.

Second, you can add a line in /etc/hosts file to this hostname pc2.example.com.

You can try to request the name resolution from your DNS server using the command:

$ dig @your.dns.server.ip pc2.example.com
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this command giving my hostname & NS A entries with success. then where is the issue?? –  Master-Man Sep 9 '12 at 9:00
@Master-Man: Did you check the /etc/resolv.conf file? –  Khaled Sep 9 '12 at 9:22
resolv.conf shows the below: root@pc1 [~]# cat /etc/resolv.conf search privatedns.com nameserver nameserver –  Master-Man Sep 9 '12 at 9:48
@Master-Man: Are these your DNS servers? –  Khaled Sep 9 '12 at 10:37

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