Visual Subnet Calculator

2019/01/29

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

2018/11/28

via AWS Tagging Strategies – AWS Answers


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

2018/11/27

https://aws.amazon.com/blogs/aws/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

2018/11/08

GitHub Universe 2018: Low Key Revolutionary – James Governor’s Monkchips
— Read on redmonk.com/jgovernor/2018/11/07/github-universe-2018-low-key-revolutionary/


The 2018 DevOps RoadMap – Hacker Noon

2018/11/01

via The 2018 DevOps RoadMap – Hacker Noon


New – Amazon Linux WorkSpaces

2018/06/28

https://aws.amazon.com/blogs/aws/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

2018/05/28

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