Marcin Jasion - Pragmatic DevOps
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How to setup AWS Site-to-Site VPN with Unifi UDM 🔒

By default resources, you launch on the cloud (EC2, RDS, and others) cannot communicate with your local networks like home or office. To allow this you can create a Site-to-Site VPN. This VPN connection will be established between your router and AWS VPC. Creating VPN between networks is well documented. However, you can have issues configuring your home router. At home, I have a Unifi Dream Machine router, which is designed for small networks, but has features that match advanced routers for offices. One of them is a Site-to-Site VPN using the IPSec protocol.

  • aws
  • vpn
  • unifi
  • networking
Wednesday, June 29, 2022 | 6 minutes Read
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How to debug Istio Upstream Reset 502 UPE (old 503 UC)

Istio is a complex system. For the applications, the main component is the sidecar container Istio-Proxy, which proxies all traffic from all containers in Pod. And this can lead to some issues. This post describes one of the most complicated problems I have encountered in my career. The problem - Connection Reset 🐛 During Istio rollout on a huge system, with more than 40 different microservices, on a single endpoint, QA engineers found a bug. It was a POST endpoint, which was returning chunked data.

  • istio
  • kubernetes
  • debugging
  • networking
Monday, April 25, 2022 | 5 minutes Read
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