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Google IPv6 Public DNS Support

Google provides an excellent set of public DNS servers but it won’t work on an native IPv6 address or transport. From the official google help pages:
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How do I test that my BIND dns server is not acting as Open resolvers? How do I test if server is acting as open resolver for abusing the large DNS queries?
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How do I disable the bind version.bind option under UNIX or Linux operating systems to improve my name server security?
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Website Not Reachable Error

The error message “website not reachable” means lots of things. Some can be controlled from your end others can be only controlled by website owner or person who is responsible for the website.
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Linux Check Bind Version

I‘m running Bind name server on Linux box but I’m not sure about version. How do I check bind version under Linux operating systems?
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I‘d like to know what TCP and UDP ports need to be open for the Domain Name Service (DNS BIND server) to function properly under Linux, OS X and UNIX like operating systems?
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CentOS Linux Setup Dynamic DNS (DDNS)

How do I setup Dynamic DNS (DDNS) in CentOS Linux 4 or 5 server operating systems?
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Airtel Check Data Usage

How do I check Airtel Broadband connection usage? How do I check my high speed data transfer limit? How do I find out how many GBs are left in my airtel account?

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The resolving name servers directly finds out information about the root servers, top level domains and authoritative name servers. It also speed up queries by caching results locallly as configured by hostmater in their domains’ TTL field. You can setup BIND 9 as caching name server to speed up dns caching for the rest of all clients. This tutorial explains:

  1. How to install BIND 9 caching only dns server under Debian Linux
  2. BIND 9 troubleshooting tips
  3. Iptables firewall configuration

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How do I edit /etc/resolv.conf file in CentOS Linux?
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