EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Hacker News·Aug 29·5 min read
POWBlock is a universal bot/DDoS defense primitive for any server
TL;DR
POWBlock is a lightweight proof-of-work defense tool designed to protect servers from DDoS attacks by requiring clients to solve computational challenges before accessing resources.
✦ Why It Matters
Deploy POWBlock today to enhance your server's defenses against DDoS attacks without complex integrations.
Key Takeaways
- Implement POWBlock to protect against automated DDoS attacks.
- Customize challenge logic and client trust factors for your site.
- Utilize existing server infrastructure to deploy POWBlock easily.
- Monitor performance metrics to optimize your server's response.
How It Works
POWBlock operates by placing a lightweight proof-of-work challenge in front of your server. When a client attempts to access your site, POWBlock serves a JavaScript page that requires them to compute a hash with specific leading zeros.
Upon successful completion, the client receives a cookie that allows them to proceed. This mechanism effectively filters out automated requests while allowing legitimate users access.