dns

March 11, 2022

LEARNING

5 Reasons a Raspberry Pi Belongs in Your Network Lab

10 min read

It's not just for Pi Day! From Pi-powered network services to a network sensor/traffic analysis device or home lab management station, the Raspberry Pi is a flexible workhorse that should be the next worthy addition to your lab.

March 27, 2021

SECURITY

Future Focused: A Safer Way to Expose Private Server Names

2 min read

Working to stay ahead of bad actors and keep our costumers secure is our priority, that's why we’re exploring a safer way to publicly advertise private services within an organization. It’s a concept we’re calling Auth-DoH.

July 9, 2019

THREAT RESEARCH

Sea Turtle Keeps on Swimming

1 min read

By Danny Adamitis with contributions from Paul Rascagneres. Executive summary After several months of activity, the actors behind the "Sea Turtle" DNS hijacking campaign are not slowing down. Cisco Talos recently discovered...

April 23, 2019

THREAT RESEARCH

DNSpionage brings out the Karkoff

1 min read

In November 2018, Cisco Talos discovered an attack campaign, called DNSpionage, in which threat actors created a new remote administrative tool that supports HTTP and DNS communication with the attackers'...

April 17, 2019

THREAT RESEARCH

DNS Hijacking Abuses Trust In Core Internet Service

1 min read

This blog post discusses the technical details of a state-sponsored attack manipulating DNS systems. While this incident is limited to targeting primarily national security organizations in the Middle East and...

November 27, 2018

THREAT RESEARCH

DNSpionage Campaign Targets Middle East

1 min read

DNSpionage Campaign Targets Middle East This blog post was authored by Warren Mercer and Paul Rascagneres. Executive Summary Cisco Talos recently discovered a new campaign targeting Lebanon and the United...

March 1, 2018

SECURITY

Debunking the myths of DNS security

3 min read

For years, we’ve been pioneering the use of DNS to enforce security. We recognized that DNS was often a blind spot for organizations and that using DNS to enforce security...

July 11, 2016

NETWORKING

Cisco Umbrella Branch: the Fastest, Easiest Security for Branches

1 min read

As an organization, providing secure guest and corporate Internet access at the branch can be a major challenge. Not only do you have to protect the enterprise, you also have to protect your customer. Protection is good… but it also needs to be simple to deploy, easy to manage, and integrates seamlessly. Let’s also not […]

June 9, 2016

SECURITY

Detection in Depth

2 min read

Defense in depth is a well understood and widely implemented approach that can better secure your organization’s network. It works by placing multiple layers of defense throughout the network to create a series of overlapping and redundant defenses. If one layer fails, there will still be other defenses that remain intact. However, a lesser known […]