DNS

Basic PC and Network Troubleshooting Tips That Still Work

Networking and Computing Tips and Tricks / By

Views: 2,018Originally published September 3, 2010. Updated November 2026. Computers have changed considerably since I first published this article in 2010. Windows has evolved, solid-state drives have largely replaced mechanical hard drives, Wi-Fi has become essential, and IPv6 is now an important part of Internet connectivity. What has not changed is the need for effective

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Public DNS Servers Explained: Which One Should You Use?

Networking and Computing Tips and Tricks / By

Views: 1,029Most people never think about the Domain Name System (DNS) until something stops working. They enter a website address, press Enter, and expect the page to appear. Somewhere along the way, DNS helps translate the domain name into the IP address needed to reach the destination. What many Internet users do not realize is

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End-to-End Encryption: A Privacy Victory or a Networking Blind Spot?

The CellStream Blog / By

Views: 931TLS 1.3, QUIC, HTTP/3, encrypted DNS, and Encrypted Client Hello increasingly conceal application and transport information that network operators traditionally used for troubleshooting, security inspection, filtering, performance optimization, and policy enforcement. Here is a little reference chart: This produces two defensible but conflicting positions: For most of the Internet’s history, and certainly for my

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What is the ‘nslookup’ command, and how can I use it?

Networking and Computing Tips and Tricks / By

Views: 8,231The nslookup command is a built-in network administration tool available on Windows, macOS, and many Linux distributions. It is used to query DNS servers to retrieve information about domain names, IP addresses, and DNS records. Basic Syntax: nslookup [hostname] [DNS server] Components: Common Use Cases: Example Output: Query a Domain: nslookup example.com Output: Server:

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What is the ‘dig’ command, and how can I use it?

Networking and Computing Tips and Tricks / By

Views: 14,848The dig command, short for “Domain Information Groper,” in Linux or MacOS is a command-line tool used to query Domain Name System (DNS) servers. The command is a lot like nslookup, but at the same time it is different. If you are a Windows user, you have to use nslookup. For a reference on

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Testing/Baselining DNS Server Performance

Networking and Computing Tips and Tricks / By

Views: 2,809As a follow on to our DNS In Depth article, we wanted to provide a reference to a great tool. One of the important impacts to how fast the Internet works for users is how fast the Domain Name Service responds to database requests.  For example, if you type www.cellstream.com into your URL and it

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A Wireshark DNS Configuration Profile

Networking and Computing Tips and Tricks / By

Views: 7,214For those of you who love Wireshark and are needing to analyze DNS Queries and Responses, we have the profile for you. Profiles are one of the most important Wireshark capabilities.  Setting up and using different profiles for different environments, protocols, and tasks is a crucial skill that we teach in our Wireshark courses.

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Using a Dynamic DNS Service Instead of a Public IP

Networking and Computing Tips and Tricks / By

Views: 1,609If you have a web/email server connected to the Internet that you want other to reach, that server must have a public IP address.  Most Internet users don’t even try to remember the IP addresses of sites they use, instead they use the Universal Resource Locator system of typing www.cellstream.com or something like this

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