Visual Subnet Calculator


I’m a sysadmin/consultant by trade. I cut my teeth on IPv4 addressing way back in the NT4 days when most addressing was still class based.

I never really got the hang of CIDR addressing but I understood the rationale and concepts of it. I was never very good at finding a good approach to subnetting and CIDR mask determination though. Usually there was a network person’s brain handy to have a conversation with and that got me by.

Then along came public Cloud and the rules for CIDR address allocation and subnetting changed again. I knew that the old approach to subnet determination wasn’t really good for the public Clouds and all the docs from the vendors wanted you to assign a /16 to every VPC/vNet you created. This always felt wasteful and like overkill to me.

I decided to hunt around for something that could help me and found this tool. Visual Subnet Calculator

AWS Tagging Strategies – AWS Answers


via AWS Tagging Strategies – AWS Answers

New – Use an AWS Transit Gateway to Simplify Your Network Architecture


It is safe to say that Amazon Virtual Private Cloud is one of the most useful and central features of AWS. Our customers configure their VPCs in a wide variety of ways, and take advantage of numerous connectivity options and gateways including AWS Direct Connect (via Direct Connect Gateways ), NAT Gateways , Internet Gateways , Egress-Only Internet Gateways , VPC Peering , AWS Managed VPN Connections , and PrivateLink .

GitHub Universe 2018: Low Key Revolutionary – James Governor’s Monkchips


GitHub Universe 2018: Low Key Revolutionary – James Governor’s Monkchips
— Read on

The 2018 DevOps RoadMap – Hacker Noon


via The 2018 DevOps RoadMap – Hacker Noon

New – Amazon Linux WorkSpaces


Over two years ago I explained why I Love my Amazon WorkSpace . Today, with well over three years of experience under my belt, I have no reason to return to a local, non-managed desktop. I never have to worry about losing or breaking my laptop, keeping multiple working environments in sync, or planning for disruptive hardware upgrades.

A mapping (no not a Swardley thing) of On Prem, AWS and Azure Security Components


A useful one pager to compare the various security products of AWS, Azure and the usual on-prem suspects/capabilities.

via Conceptual Mapping of On-premises Infrastructure Security Components to Cloud Security Services by Adrian Grigorof CISSP, CISM, CRISC,CCSK – physical, providers, security function | Peerlyst