DNS problems on CentOS fresh install

Asked By ayannahana 10 points N/A Posted on - 06/01/2012

I'm having some DNS issues on a new box I'm installing with CentOS 6.2. I am able to look up names using nslookup, dig, or host. I am able to ping machines by name or by IP address. However, when I try other tools, such as ssh, wget, or yum, they are unable to resolve names. What should I do?

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• Question Category: CentOS Linux

Answered By Pingol Stas 5 points N/A #142119

DNS problems on CentOS fresh install

Hello,

First and foremost, please end up the firewall process and always does this whenever you are troubleshooting or having issues with the network. I would like to recommend you to try on these several ways.

1. Type iptables-L to check whether the firewall has already been stopped properly. Your input should look like this :

[root@server1 ~]# iptables -L

Chain INPUT (policy ACCEPT)

target prompt opt source destination

Chain FORWARD (policy ACCEPT)

target prompt opt source destination

Chain OUTPUT (policy ACCEPT)

target prompt opt source destination

[root@server1 ~]#

2. Type (/etc/selinux/config) to check whether the selinux is running properly or having any strange activity.

3. Please type route-n and check the output given.

4. Type /etc/sysconfig/network-scripts/ifcfg-eth0 and see what is the result.

5. Try to ping your gateway and check whether is there any issues raised or not.

I hope you can diagnose the issue with few clues given.

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• Posted on - 06/16/2012
• Question Category: CentOS Linux