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I have a CentOS 6 x86 server. If I ping 8.8.8.8 and my server gateway, there's no problem. If I ping google.com, yahoo.com, etc, it returns "ping: unknown host google.com". When I saw this problem, first thing I go to check is the /etc/resolv.conf file, but this file seems no problem. Where else should I check?
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Few things you can try Look at Look for hosts: and see if it has dns listed Then try to query google.com from their nameservers.. maybe output dns requests are failing If that fails.. then If you get a connection refused.. your ISP might be blocking your dns requests and you have to use their resolvers. | |||
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Do you maybe have a firewall in between which is blocking DNS traffic? You can try to make a lookup with dig and see if it works or not: If this does not work then it is probably a device (firewall) in between which is blocking your DNS traffic. | |||
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It seems that you don't have internet access at all, don't you? If this is the case, have a look at your routing table using command If you don't see a line like this one: you probably have a gateway problem, check your network settings. | |||||||
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