Wireshark Protocol Filter TLS: A Comprehensive Guide

Wireshark is a powerful network protocol analyzer that allows users to capture and inspect network traffic in real-time. One of the most common tasks when working with Wireshark is filtering network packets based on specific protocols, such as HTTP or HTTPS. In this article, we will explore how to use the OR operator to create a filter for TLS (Transport Layer Security) protocol in Wireshark.

To start, let's assume you want to capture all packets related to a specific website that uses TCP port 80 and IP address 65.208.228.223. You can do this by using the following filter:

tcp.port = 80 || ip.addr = 65.208.228.223

This filter will show only packets with 65.208.228.223 in either the source or destination columns.

However, if you want to capture all HTTP traffic related to a specific site, regardless of whether it's using TCP port 80 or not, you can use the AND operator:

tcp.port = 80 and ip.addr = 65.208.228.223

This filter will show only packets that are related to your browsing of any HTTP sites.

Now, let's talk about filtering HTTP traffic in Wireshark. To display all the HTTP traffic you need to use the following protocol and port display filter:

tcp.dstport = 80

However, this filter is not showing the whole picture because it doesn't include setup handshakes and termination packets. You'll notice that all the packets in the list show HTTP for the protocol.

To display packets using the HTTP protocol, you can enter the following filter in the Display Filter Toolbar:

http

This filter will show all packets that are related to HTTP traffic.

In conclusion, filtering HTTP traffic in Wireshark is a fairly trivial task but it does require the use of a few different filters to get the whole picture. By using the OR and AND operators, you can create complex filters that capture specific network packets based on your needs.

Remember, when working with Wireshark, it's important to start by capturing some HTTP traffic, then apply the necessary filters to inspect the captured packets. With practice, you'll become more comfortable using Wireshark protocol filters to analyze and troubleshoot network issues.

Wireshark protocol filter tls