Security & Firewall
Protect your origin server from malicious traffic, DDoS attacks, and unauthorized access. Every request is filtered at the Edge before it ever touches your backend.
Access Control
IP Blocking
Block specific IP addresses or CIDR ranges (e.g. 192.168.1.0/24). Blocked requests are rejected with a 403 Forbidden response instantly.
Country Firewall
Block or challenge traffic from entire countries using our GeoLite2 database. You can return 403s or trigger CAPTCHAs.
CAPTCHA Challenge
Instead of blocking visitors, present them with a challenge. Only humans who solve the CAPTCHA gain access to your site.
Bot Filter Active
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Managed Rulesets
SQL Injection
Protects against malicious database queries.
Cross-Site Scripting (XSS)
Blocks script injection payloads.
Bad Bots
Identifies malicious crawlers and scrapers.
Rate Limiting
Limit requests per IP to prevent scrapers or brute-force attacks. High-speed lookup powered by Redis adds under 1ms latency.
Automatic DDoS Protection
Fast.site detects Layer 7 HTTP flood attacks automatically using statistical deviation analysis (σ-based).