AWS VPC routing tables are one of the most important components of cloud networking. They determine where network traffic goes after it leaves a subnet and help control communication between EC2 instances, databases, private services, on-premises networks, and the internet. A routing table can look simple, but a single missing or incorrect route can cause major production problems. Applications may become unreachable, private servers may lose internet access, or traffic may unexpectedly take a different network path. Understanding routing tables through real production scenarios makes troubleshooting much easier. What Is an AWS VPC Routing Table? A route table contains rules that determine where traffic destined for a particular IP address should be sent. A typical route table might look like …

Setting up AWS SNS (Simple Notification Service) and SQS (Simple Queue Service) is easy, but they can be very useful for connecting apps and managing a lot of messages at once. Sometimes, though, things don’t go as planned, messages don’t get sent, on the other hand, lines stay empty, or subscriptions get stuck. Also, at times, it can be annoying when you don’t know what the problem is. The good news is that once you know where to look, most of these problems are easy to fix. We will talk about the most common reasons why SNS messages might not get to SQS in this guide. These include confirmations of subscriptions and IAM rights, as well as Dead-Letter Queues (DLQ), …