vercel-firewall

To configure Vercel WAF rules and block malicious traffic, you define custom rules with actions like deny, challenge, log, bypass, rate_limit, or redirect based on request attributes such as path, host, headers, geo, and TLS fingerprints via the Vercel CLI.

The best way to apply rate limiting on Vercel is to stage a log-only rule first, review the matched traffic in the firewall dashboard, and then publish the rate_limit rule to production once you confirm it only targets abusive requests.

Vercel Attack Mode works for DDoS mitigation by allowing you to enable or disable emergency response settings immediately during active incidents, pausing or resuming system mitigations to handle short-term threats and debug false positives.

Yes, you can stage Vercel firewall rules by creating drafts and reviewing changes with `vercel firewall diff`, then explicitly applying them to production using `vercel firewall publish --yes` to ensure operational safety.

You manage system bypass and mitigations in the Vercel firewall by applying specific security modes immediately through the Vercel CLI, allowing you to pause or resume system protections for emergency handling and false-positive debugging.

You can create custom allow, deny, challenge, or rate-limit rules in Vercel using conditions based on request attributes including path, host, headers, geo, and TLS fingerprints to accurately enforce traffic filtering.