How to close an open DNS resolver

Posted by bob on Apr 24, 2014 11:19 AM EDT
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The DNS server that we have created in the previous tutorial is an open DNS resolver. An open resolver does not filter any incoming requests, and accepts queries from any source IP address. Unfortunately, an open resolver can become an easy target to attackers. For example, attackers can initiate a Denial of Service (DoS) or […]Continue reading... The post How to close an open DNS resolver appeared first on Xmodulo. Related FAQs: How to run iptables automatically after reboot on Debian What are available iptables management tools with GUI? How to set up a transparent proxy on Linux How to count the number of open network connections on Linux How to set up a transparent HTTPS filtering proxy on CentOS

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