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Intrusion detection and prevention with AWS Lambda and DynamoDB streams

April 5, 2017 by Paulina Budzoń

Intrusion detection system (IDS) and intrusion prevention system (IPS) tend to be expensive and complicated. In AWS, you can go for much simpler solution - WAF. But that requires you to use Application Load Balancer or CloudFront. But even with WAF, you have to manage a list IP addresses of attackers that should be blocked. Or, if you only ever need to block single IPs for short periods of time, NACLs may be a much easier option! Here’s a walkthrough on how you can implement a terribly simple (yet very powerful) intrusion detection and prevention in AWS with Lambda and DynamoDB Streams for a web application.

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Update on the deadline for AWS Specialty Beta exams

April 3, 2017 by Paulina Budzoń

If you’re still waiting for the results of the AWS Specialty Beta exams (Security, Big Data or Networking), you are not alone. The results and final versions of the exams were supposed to be released at the end of March. But March came and went, and we only got one small update from AWS.

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AWS Certified Solutions Architect vs DevOps exams - my subjective comparison

March 27, 2017 by Paulina Budzoń

Last week, I finally had the time to schedule my AWS Certified Solutions Architect - Professional exam, which I passed on Saturday. It’s been a while since I did the other AWS Professional level (DevOps) certificate, but I thought I’d share my take on how the exams compare.

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My thoughts on RedHat's EX403 exam

March 20, 2017 by Paweł Biernacki

I’ve recently gained the Certificate of Expertise in Enterprise Deployment and Systems Management after passing EX403 . I took the exam in the City of London as an individual session - this time on KOALA - Kiosk On A Laptop. On the RedHat’s site the exam is advertised to take three hours but after starting the exam I found that the clock shows four hours.

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Bug in KMS: encryption key that cannot be deleted

March 6, 2017 by Paulina Budzoń

Recently, I noticed a weird KMS key on an AWS account - what was weird about it, was the fact that it wasn’t marked as AWS-managed key, but no-one (not even root) could delete or modify the key!

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