Network Security Monitoring

The past few weeks have seen several developments around Community ID, our open standard for rendering network traffic flow tuples into a concise textual representation. I’d like to summarize them in this blog post. Read more »

I often develop packages for Zeek in cluster mode. In this configuration, it can be difficult to debug your package because it is a continually running environment with real, and often unpredictable, network data. If you add to that other packages... Read more »

This post contains a warning and a solution for anyone using BPF syntax when filtering traffic for network security monitoring. Read more »

Some critics claim that ever growing encryption renders network security monitoring useless. This opinion is based on a dated understanding of the types and values of data collected and analyzed by computer incident response teams (CIRTs) that... Read more »

In this post, we’ll explore DNS over TLS (DoT) and DNS over HTTPS (DoH). Read more »

Some things just go well together. A privilege of working with very sophisticated defenders in the open source community is seeing the design patterns they use to secure their organizations – both technology and workflows. One of the most common has... Read more »

With Corelight’s latest software release, v19, we are excited to announce the expansion of our Encrypted Traffic Collection (ETC). The ETC was introduced in late 2019, but as a reminder it’s a collection of security insights around SSL/TLS and SSH... Read more »

CVE-2020-13777 is a high severity issue in GnuTLS. In a nutshell, GnuTLS versions between 3.6.4 (released 2018-09-24) and 3.6.14 (2020-06-03) have a serious bug in their session resumption code, which lets attackers either completely decrypt... Read more »

Editor’s Note: Richard recently shared his thoughts on our blog which are now included in an article contributed to StateTech on why the overarching role of the network and election infrastructure is worthy of a deep assessment right now. If state... Read more »

One of the most popular and regularly occurring questions I see in network security monitoring forums involves how to instrument a small office – home office (SOHO) environment. There are ways to accomplish this goal. For example, I instrument my... Read more »