![]() ![]() Similarly, you can filter traffic by a specific UDP port by using "udp.port = 53" (without the quotes).Īnother way to filter traffic by port is to use the "Filter Expression" dialog box. ![]() This will show only the packets that have a source or destination port of 80. To filter traffic by a specific port, you can enter "tcp.port = 80" (without the quotes) in the filter bar. The simplest way is to use the filter bar at the top of the Wireshark window. Wireshark provides several ways to filter network traffic by port. For example, when a web browser sends a request to a web server, it typically uses port 80 for the request. When a host sends or receives data, it uses a specific port number to identify the process that is sending or receiving the data. In the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP), a port is a 16-bit number that identifies a specific process running on a host. In this article, we will discuss how to filter network traffic by port using Wireshark and provide some code examples.īefore we begin, it's important to understand the concept of ports in the context of network communication. One of the powerful features of Wireshark is the ability to filter captured packets using a wide range of criteria, including the source and destination ports. Wireshark is a popular open-source packet analyzer that allows users to capture and analyze network traffic.
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