read about technology, with a focus on networking and automation, and whatever else comes along


Welcome to Proliferous Technology! You can find the five latest posts below or you can use the menu to reach other parts of the site. I hope you find something useful.

Default Gateway Behavior On Cisco Switches
Published on 2018-09-23
On Cisco switches that do not perform routing, setting up a default route or a default gateway can be a little bit confusing. I’ve seen some configuration drift in our network recently were incorrect settings caused some switches to become unreachable for management. Read on to find out the details. After some switches went offline for management, I discovered they had both the ip default-gateway and the ip routing setting enabled.


Building A Network Automation Lab
Published on 2018-09-22
While preparing to dive into Ansible and Nornir a lot more, I decided to set up a good lab environment. Making use of Eve-NG and some well-known Linux tools, you can build whatever you need. I’ve built a simple topology based on Cisco for switching and Juniper for routing, to try out any automation tool I choose. Read on to find out more. For practicing different network automation skills, I’ve had the idea for a while already to build some kind of multi-vendor lab network, then connect that lab to a management server.


Running HAProxy and Let's Encrypt on Docker
Published on 2018-09-20
I had to migrate my reverse proxy away from the PfSense package to a standalone solution. One requirement was having automated certificates from Let’s Encrypt. Manually setting up all kinds of Linux applications will become tedious, so once again we’re looking at leveraging Docker to simplify operations. The PfSense package for HAProxy has kept me reasonably happy until it didn’t. The package is brilliant for quickly getting a reverse proxy running including SSL offloading with Let’s Encrypt integration.


Using Docker Securely On Management Servers
Published on 2018-09-17
My latest post is published at Packet Pushers. Head over to their site to read it: Using Docker Securely On Management Servers


Building A Docker Network Automation Container
Published on 2018-09-12
This is my first post that’s published at Packet Pushers. Head on over to their site to read this post about Building A Docker Network Automation Container!