Archive of posts: 'packet capture' tag

When verifying that FlowView is identifying flows with the correct application, we use tcpreplay to send traffic from packet capture files into an appliance capture interface. The packet captures can be homemade by us or from our customers. These packet captures are typically recorded without filtering, so naturally they will contain extraneous protocols and many mid-conversation sessions that happened to...

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Want to build a packet generator using free software and commodity hardware? Wouldn’t it be nice if that packet generator was just as fast as expensive hardware-based packet generators? What if it was more powerful, flexible and easier to use than commercial alternatives? My blog “Why Test NetFlow with Tcpreplay 4.0” introduced Tcpreplay 4.0 as an alternative to hardware packet generators....

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This is the first post of Flowvember - AppNeta’s celebration of really awesome, application-aware traffic analysis technology. And in the spirit of Movember and FlowVember, we challenge you to join us in growing out your mustache and checking out your network traffic. Get AppNeta’s FlowView free trial here. And, if you like what you see and decide to buy, we...

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The reach and popularity of video conferencing, telepresence and visual collaboration services is exploding, enabling business to happen 24×7 around the world. But, if you’re a consumer or provider of these increasingly business-critical applications, you know they depend entirely on one thing: network performance. IP-based videoconferencing requires high-performance WAN links. This class of applications operates within a narrow Quality of...

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Open source award winner Wireshark is probably the most widely deployed network protocol analyzer/packet sniffer out there. It lets you capture and interactively browse network traffic, and shows the packets to you in a human-readable form. Wireshark is the tool that first made the world of network and application troubleshooting accessible to IT staff. Thanks to the contributions of networking...

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I spend a good amount of time talking to people about computer networks, their company’s networks, their customers’ networks, telco providers, etc, and the most common question that comes up is “What is using up all my network capacity.” For such a fundamental question this is surprising difficult to answer for the vast majority of companies. Any network engineer worth...

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