How to add an ESA’s DKIM Signature to a DNS TXT Record

Hopefully, this post will help you save a lot of time when trying to add a DomainKeys Identified Mail (DKIM) signature to a Windows server. The motivation for this post is simply because I spent more than enough time trying…

Configuring FlexVPN Point-to-Point IKEv2 S-VTI

In this article, we're going to configure a point-to-point IKEv2 Static Virtual Interface (S-VTI) between two Cisco CSR1000v routers using pre-shared keys as the authentication method. To demonstrate this, we're going to use part of my lab topology as shown…

Duo 2FA for SSH to Ubuntu Server

In this demonstration, we will configure Duo two-factor authentication for Ubuntu servers. Lab Set-up Ubuntu Server 18.04.4 (Bionic)Duo account Add Local User Accounts If you have multiple user accounts that require access to the servers, create these users before adding…

How To :: Integrate GNS3 with EVE-NG and Physical Equipment

Last year I wrote an article about EVE-NG and how it could be leveraged to create virtual networks. It's rich feature-set and device support closely matches that offered by GNS3 and Virl, making it a strong contender for the go to…