I am often exposed to new network devices and the ways that they support and configure flow-monitoring technologies. So I was excited to learn this new Cisco Firepower Threat Defense NetFlow configuration.
This configuration uses all the same NSEL configuration commands that you would use on a Cisco ASA, in just about the same order as I described in this Cisco ASA configuration blog. The difference is that you are applying the commands using a GUI interface and not CLI.
Read moreLast year Plixer released version 19 of Scrutinizer, and with it came the introduction of Plixer Security Intelligence, our machine learning appliance.
The ML appliance learns and establishes what is normal in network traffic behaviors across hundreds of data models. When Scott’s PC reaches out to an application that he has never touched, or exhibits out-of-the-ordinary traffic behaviors, that activity is flagged and alarmed on.
Read moreThe need to detect and mitigate denial-of-service attacks is nothing new to network and security administrators. DoS attacks on enterprise networks have been occurring for years.
Read moreDo you find that you are constantly modifying NetFlow configurations to balance collector workloads? The latest release of Scrutinizer introduces an option to load balance the collector workload across multiple, distributed-collector clusters by automatically modifying Plixer Replicator profiles based on the number of exporters and flow volume processed at each collector.
Read moreA few years ago, we added a behavioral algorithm to Plixer Scrutinizer that looked at all the flow data that was collected and determined if there was possible ICMP tunneling taking place. That algorithm alarmed if it determined that packet sizes were abnormal for ICMP traffic from a Windows or Linux platform.
Read moreAs resource demands and bandwidth speeds in many of today’s network infrastructures continue to increase, many network administrators believe that NetFlow sampling is the only way to deal with the high flow volume sent across the network. In fact, setting a NetFlow sample rate of 1 in 100 can cut flow volumes as much as 50%.
Read moreI was working with a customer last week who had configured NetFlow on four of their Cisco routers. They had applied basically the same configuration to each of the routers, but only saw exported flows from three of them arrive at the collector.
Read moreLately, I have seen an increase in support calls regarding the increase in bandwidth consumption and the degradation of application performance seen when employees started working from home because of the coronavirus outbreak.
Read moreQuestions regarding deduplicated NetFlow often come up when beginning to research NetFlow solutions. This blog will address some of the reasons why deduplication might not be the best way to go.
Read moreA common question that has been coming up on product demonstrations over the last few weeks is, using NetFlow, is there a way to track and locate a private host IP address behind my NAT routers?
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