Firewall blocking 30% of my traffic after Launch Day

Help
1

Hey, I launched my app recently and noticed something strange with Vercel’s firewall.

On launch day, the app received around 1,000+ requests, and ~350 were blocked by the firewall.

Problem:
The next day, I got ~800 requests, with ~290 blocked. That’s over 30% of traffic being filtered out, which seems excessive — especially for a fresh app with no history of abuse.

What I expected:
Maybe a few flagged requests here and there, but not hundreds. My traffic was organic, no ads, nothing spammy — just launch buzz. I expected the firewall to calibrate or be lenient for early traffic, but it seems overly aggressive.

Setup:
• Hosted on Vercel
• App built with no frameworks, just static html, css and js
• Production environment
• URL: https://www.nomouse.app
• No custom firewall settings — using default DDoS protection

Questions:

  • How can I relax the firewall rules to prevent false positives without risking abuse?
  • Is this normal for new apps with sudden small-scale traffic bursts?
  • Is this legit DDoS or is it the firewall freaking out?
4

Hey! Welcome to the Community :waving_hand:

This might take more investigation!

Take a look at your Vercel dashboard, under your project’s Analytics or Security tab, you’ll be able to see which types of requests are being blocked and why. From there, try to spot any patterns, like whether certain countries, user agents, or request types are getting flagged more often.

Since posting this, did you see anything else odd?

5

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