This process can take some time if there is not an exact match for the domain name in one of the DNS servers’ cache.ĭNS is a hierarchical system. The DNS servers query other DNS servers until they eventually find the IP address for the domain. Whenever you type a domain name into your web browser, your computer queries DNS servers to find out the IP address for that domain. It is simply a database that links meaningful names (known as host names), such as to a specific IP address, such as 185.230.63.171. How to use tcpdump to filter DNS Query packets?ĭNS is short for Domain Name System.Capture DNS zone transfer Packets with Tcpdump.So, let’s dive in and learn more about this essential tool. In this article, we’ll explore how TCPdump can be used to capture DNS packets and how it can help you in your Linux admin tasks. With TCPdump, you can analyze DNS query traffic which gives you greater insights into how DNS works. TCPdump is a powerful Linux command that can help you capture and filter network packets.
If you’re a Linux system administrator, then you’re probably familiar with DNS, which is a critical component of networking.
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