Category Linux

Exploring DNS Port with Examples

DNS port is confusing for many people. In this article, we’ll describe how DNS works, and what DNS port numbers are used for DNS protocol. Port Usage TCP port 53: Large DNS responses (TCP is used when the DNS response…

Understanding TCP Connection with Examples

TCP is defined as a connection-oriented and reliable protocol. We will check out how TCP connection works in this article. How TCP Connection Works? TCP allows for the transmission of information in both directions. This means that computer systems that…

Understanding TCP Socket With Examples

TCP socket is a fundamental concept in the operation of TCP/IP application world. We will deep dive into the details of how the TCP socket works. Network Socket For example, if we have a website running on IP address 100.1.1.1,…

Tcpdump: Filter UDP Packets

tcpdump is a powerful command-line network packet analyzer used for network troubleshooting and analysis. To capture UDP packets using tcpdump, you can use specific filtering options to narrow down the traffic you want to capture. UDP Protocol UDP is a…

Tcpdump: Filter Packets By Port

Tcpdump is a CLI tool to capture raw network packets. It is very useful for various forms of network troubleshooting. We will learn how to filter packets by port in tcpdump command. TCP and UDP Ports Our system uses ports…