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Packet Capture with Pyshark and Elasticsearch

Network packet capture and analysis are commonly done with tools like tcpdump, snort, and Wireshark. These tools provide the capability to capture packets live from networks and store the captures in PCAP files for later analysis. A much better way to store packets is to index them in Elasticsearch where you can easily search for packets based on…

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TCP/IP Sockets with Time Out Capabilities

Recently I had a question from one of my readers about how to close connections on a server when there are no requests received after a certain period of time.  The question was asked with regard to the tcpsockets classes I covered in my blog TCP Network Programming Design Patterns in C++, none of which support…

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Multithreaded Work Queue Based Server in C++

Creating a multithreaded TCP/IP protocol based server requires the capabilities to handle network communication, multithreading and transferring data between threads. I have described how to build C++ components to handle this functionality in previous blogs. This time I’ll show you how to combine these components to create a simple multithreaded server.   Background Articles The…

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TCP/IP Network Programming Design Patterns in C++

Network programming with the BSD Sockets API involves making a series of boilerplate calls to several operating system level functions every time you want to create connections and transfer data over TCP/IP networks. This process can be both cumbersome and error prone. Fortunately there is an easier way to develop network applications. By thinking in…

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Develop a Packet Sniffer with libpcap

Libpcap is an open source C library that provides an API for capturing packets directly from the datalink layer of Unix derived operating systems. It is used by popular packet capture applications such as tcpdump and snort that enables them to run on just about any flavor of Unix. Here’s an example of a simple packet sniffer application based on…