![]() To replay saved HTTP packets: $ httpry -r output.dump To save raw HTTP packets into a binary file: $ sudo httpry -i eth0 -b output.dump On the other hand, -o option saves human-readable output of httpry into a text file. The -b option allows you to save raw HTTP packets into a binary file as is, which then can be replayed with httpry later. ![]() So you want to save captured HTTP packets for offline analysis. In most cases, however, you will be swamped with the fast scrolling output as packets are coming in and out. Httpry then listens on a specified network interface, and displays captured HTTP requests/responses in real time. The basic use case of httpry is as follows. You can easily build httpry from the source by: $ sudo yum install gcc make git libpcap-devel On Fedora, simply run: $ sudo yum install httpry So build it from the source: $ sudo apt-get install gcc make git libpcap0.8-devįirst, enable EPEL repo, and then use yum command: On Debian-based systems, httpry is not available in base repositories. Install httpry on Linux Install httpry on Ubuntu or Debian In this tutorial, let's see how we can sniff HTTP traffic with httpry. httpry captures live HTTP packets on the wire, and displays their content at the HTTP protocol level in a human-readable format. In fact, httpry is extactly that: HTTP packet sniffing tool. What will be nice is to have tcpdump-like sniffing tool, but targeting HTTP traffic only. Real-time web server log parsers such as ngxtop provide human-readable real-time web traffic traces, but only applicable with a full access to live web server logs. While packet sniffing tools such as tcpdump are popularly used for live packet dump, you need to set up proper filtering to capture only HTTP traffic, and even then, their raw output typically cannot be interpreted at the HTTP protocol level so easily. ![]() ![]() Whatever the reason is, there are cases where HTTP traffic sniffing is helpful, for system admins, developers, or even end users. Or you may be trying to troubleshoot PAC (proxy auto config) or check for any malware files surreptitiously downloaded from a website. Or you may be debugging a web application or a RESTful service. For example, you may be testing experimental features of a web server. Suppose you want to sniff live HTTP web traffic (i.e., HTTP requests and responses) on the wire for some reason. How to sniff HTTP traffic from the command line on Linux ![]()
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