Blog Archives

How to setup ssh keypair authentication in Cisco ASA

I created a short video on how to configure Cisco ASA to allow a CLI user to authenticate with RSA keypair when connecting with SSH instead of username/password. See video below. In short, this is how to do it: username

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Posted in Cisco Security, Security

Cisco ASA Anyconnect licensing for dummies, updated!

The picture below should be self-explaining. Click it for a larger version. Edit 2014: There was some errors in the logics around AEA-licenses. The picture below is now corrected. Please do not use the old version (v1.1).   Let me

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Posted in Cisco Security

DNS Doctoring in Cisco ASA

Issue: Your internal clients tries to reach an internal server but since they resolves the address of the server from an external DNS-server they will get a public IP.   Solution: DNS Doctoring.   In the example below your client

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Posted in Cisco Security

Make drawings to understand the topology of firewall implementations

Every time I see a new implementation of a Cisco ASA firewall I need to know how it is connected. Before doing any changes in the configuration and before answering any answers regarding the functionality of the FW i first

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Posted in Cisco Security

Cisco Cyber Threat Defense

I am currently attending an introduction class in Cisco Cyber Threat Defense. Since I never heard the phrase before I couldn´t wait showing up.   Cisco Cyber Threat Defense is a conceptual thing just like TrustSec. It brings several building

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Posted in Cisco Security


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