tcpdump command analyzes network behavior, performance and applications that generate or receive network traffic including dns traffic. The parent nameserver sent GLUE, meaning he sent your nameservers as well as the IPs of your nameservers. This is a must if you want to be found as anyone that does not know your DNS servers will first ask the parent nameservers. tcpdump command works on most Unix-like operating systems. The parent server a. has your nameservers listed. You can use the tcpdump command to dump traffic on a network and view dns traffic. (Fig.04: 10.0.80.11 and 10.0.80.12 are my DNS server IP address assigned under Unix like operating systems) Method #4: Dump and view traffic on a network (recommended for advanced users only) Once all are removed, the router for the network you’re connecting to will assign the DNS server. Hence, type the bat/ cat/ more or less command: Highlight any DNS server which may have been manually entered, and then click on the to remove it. It was passed on to you by your modem / router. However, a better approach is to go through /etc/nf file to see assigned dns server address to your computer. So 10.0.10.11 is my DNS server IP address on Linux, Unix or macOS/*BSD based systems. From the System Preferences screen select Network Select the network you want to check DNS settings for then click Advanced Select the DNS tab By default. The DNS service can automatically filter out ads, malicious websites, tracking, and phishing. Highlight any DNS server which may have been manually entered, and then click on the to remove it. Sample outputs: SERVER: 10.0.10.11#53(10.0.10.11) AdGuard has a DNS service in addition to an adblocker. OR use the dig command along with the grep command: Sample outputs: Received 229 bytes from 10.0.10.11#53 in 0 ms Open the terminal application and then type the following host command along with the grep command: Open the bash shell prompt and type the dig or host commands. Method #3: Apple OS X or Unix / Linux Commands This one is used by my computer, and it was passed on to my computer by ISP modem / router. In this example my DNS server is located at 192.168.1.2. Fig.03: MS-Windows command to find out DNS server IP addresses
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