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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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 prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot 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.