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An alert touches multiple segments of the network, representing the challenge to reduce false positives
Deep Network Observability

How to Reduce False Positives with Shared Context

False positives are rarely caused by too many alerts, but by missing context. Let’s say a spike in outbound traffic shows up in the firewall logs. Around the same time, ...

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Magnifying glass on top of a diagram that looks like both a fingerprint and a network, representing end-to-end network troubleshooting
Network Operations

Why Most Performance Investigations Start in the Wrong Place

A padlock silhouetted against a dark background, surrounded by a spray of white particles, representing password spraying detection.
Security Operations

What Password Spraying Looks Like in Raw Network Telemetry

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briand
Network Operations

Use Flow Data to Track Down DMCA Violations

The Digital Millennium Copyright Act (DMCA) was passed on October 12, 1998 as a means to mitigate the effect

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General

Cisco ASA NetFlow Reporting

In this blog I will go over Cisco ASA NetFlow reporting and how it has changed in V8.4.7+/9.1.4.1+. If you have

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Network Operations

Cisco ASA NetFlow Problems

Although the Cisco ASA NetFlow exports have had some problems in the past, Cisco was the first vendor to

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Network Operations

Cisco ASA v8.4(5) Supports Bidirectional NetFlow

This is a follow up to Michael Patterson’s blog last month regarding Cisco ASA v8.4(5) supports bidirectional NetFlow exports.

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Network Operations

How to run Cisco ASA ACL Reports: Netflow Security Event Logging

In this blog I’ll show you how to use Cisco ASA NSEL (aka Cisco ASA NetFlow) reporting to monitor

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Network Operations

Cisco ASA NSEL Webcast

Join the Cisco ASA NSEL Webcast and learn about our new NetFlow NSEL (Network Secure Event Logging) reporting capabilities. This

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Security Operations

Cisco ASA NSEL Reports : NetFlow

We have beefed up our Cisco ASA NSEL Reporting using of course NetFlow. NSEL = NetFlow Secure Event logging and

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