How can I stop bots from filling the waiting room during high-demand sales?
During popular event sales, our site can receive tens of millions of requests. The current waiting room helps control the crowd, but bots and scalpers still occupy queue…
rate limiting
How do I build a guest cash-on-delivery checkout with Next.js and Supabase?
I'm building an online store for a client using Next.js and Supabase, and they want customers to place cash-on-delivery orders without creating an account or signing in. I'm…
How do guest cash-on-delivery orders work in a Next.js and Supabase store?
I'm building an online store for a client using Next.js and Supabase, and they want customers to place cash-on-delivery orders without creating an account or signing in. How…
How should concurrent Terraform pipelines coordinate Azure throttling?
I ran six Terraform pipelines against one Azure subscription at the same time, all using the same service principal. Three started returning 429 errors within about four minutes.…
How do I attach an SQS event source to a durable Lambda with CDK?
I'm designing a rate-limiting workflow with an SQS queue. A client-side durable Lambda places requests on the queue and waits for a callback. A server-side durable Lambda consumes…
How can I control Layer 7 DDoS costs with Azure Front Door?
We're a small business handling roughly 200,000 requests per day, but we recently experienced short Layer 7 DDoS bursts involving several million requests. I configured WAF rate limits,…
How can I safely host a personal BYOK web app online?
I built a personal web app for writing roleplay scenes. It uses BYOK (Bring Your Own Key) for services such as the database, and I would like to…
What could cause synchronized homepage floods from thousands of rotating residential IPs?
I run a nonprofit educational website built with Django, Gunicorn, and Nginx behind Cloudflare. Around 1:00 AM on August 8, CPU usage began jumping from roughly 20% to…
What could cause synchronized homepage floods from tens of thousands of residential IPs?
I run a nonprofit educational website built with Django, Gunicorn, and Nginx behind Cloudflare. Starting around 1:00 AM on August 8, the server began experiencing repeating CPU spikes…
Why would a website ban an IP over a typo or quick page request?
I use a fairly ordinary website for work, and its security rules are unbelievably aggressive. I was IP-banned after entering a URL with a typo, and the site…
Can AWS WAF and CloudFront protect an externally hosted online shop?
We run a small online shop that has become slow over the past few days because of heavy bot traffic and a large number of requests. Our provider…
How are you handling runtime rate-limit changes without rebuilding containers?
Our rate limits—token-bucket sizes, thresholds, and similar values—are currently part of the static configuration baked into each container image. When traffic spikes or we need an emergency throttle,…
What’s the best way to build multi-provider LLM fallback in Python?
I'm building a CLI agent that should automatically switch between OpenRouter, Ollama, OpenAI, Anthropic, and Gemini when a provider hits rate limits or becomes unavailable. I wrote a…
How to Manage OpenAI Usage as Your App Grows?
I've been running into some issues as my usage of OpenAI has scaled with multiple users and endpoints. It's gotten pretty messy, with challenges like unclear usage per…
How to Protect My Website from DDoS Attacks and Avoid Unexpected Charges?
Hey everyone! I'm currently working on a personal MERN web application that I've hosted on Render. I'm planning to release it to a small community of players, with…
Is AWS API Gateway a Good Choice Without Using Lambda?
I'm considering the use of AWS API Gateway for our project, but we're not utilizing Lambda at all. Our setup is based on ECS Fargate, and we have…
How Can New Developers Protect Their Servers from Bot Traffic and Unexpected Bills?
I'm relatively new to development, and I've just experienced a shocking increase in my server bill due to heavy traffic from scraper bots. While legitimate user traffic seems…
Is Anyone Else Experiencing Rate Limiting When Sending Emails to Outlook Domains?
Starting this past Monday, February 23rd, I've been facing issues with sending bulk emails to Outlook, Live, MSN, and Hotmail domains. The error message reads: "451 4.7.650 The…
How Can I Effectively Rate Limit Lambda Processing with SQS?
I'm working on an app that lets users perform bulk imports of products. When a user starts an import, each product gets added as a message to an…
How to Handle Rate Limits on an API with AWS Lambda?
I'm dealing with a situation where we have an ad-hoc burst operation that runs once or twice a month, sending thousands of messages to a queue processed by…