Use Azure MFA With Microsoft NPS (RADIUS) Server
KB ID 0001759 Problem I was in a forum last week and someone asked, “Can I enable Azure MFA, on my RADIUS server, to secure access to my switches and routers etc”. It turns out if you want to enable Azure MFA with Microsoft NPS it’s actually quite simple. So, I’m using RADIUS auth (above) on my NPS server, and it’s simply checking the authenticating user is a member of a domain security group....
Cisco – Joining Layer 2 Networks Over Layer 3 Networks
KB ID 0001313 Problem It’s a common problem, you want to connect one site to another and still have them on the same layer 2 network. As you can see above both the routers at the bottom are in the 172.16.1.0/24 network, let’s assume they are clients in the same layer 2 network how would you connect them? Solution Option 1: xconnect over L2TP All the ‘heavy lifting’ is done on the SiteA and SiteB routers. We...
Cisco IOS – DHCP Helper (DHCP Relay) – IP-Helper Setup
KB ID 0001168 Problem Cisco documentation calls this a ‘DHCP Relay’, and uses the command IP-Helper, and I usually call this DHCP Helper, just to confuse everyone. To be fair the term DHCP Relay is an industry standard, it’s not particular to Cisco (as you will see later when I Wireshark the traffic). So If you are reading this you have a DHCP server and you want to use it to lease addresses to clients that are on a...
Cisco Router IOS – Configuring EIGRP
KB ID 0000929 Problem For the first time in about ten years I had to deal with EIGRP last week, so I thought I would run it up in a lab. Normally I would use GNS3 but for this procedure I’ll use Cisco Packet Tracer.</p< In fact I’ll include the files so you can download and use the lab yourself, (if you have a copy of Packet Tracer). And I’ll also include the configs for all the routers. In the lab I’ve...
Cisco Symbols (3D) Visio Stencils
KB ID 0001041 Problem I have to do a LOT of network drawings in Visio, and the standard Cisco Visio templates look a bit dated now. So how about some that look a little bit more professional? I used to use the Cisco Packet Icons library, but that meant cutting them out of Powerpoint all the time. Solution These are all part of the Cisco Validated Design Library, I don’t know why I never found them before. Cisco Validated Design...