How to Block VPN and Proxy Traffic in APIs for Better Security and Fair Usage
VPNs and proxies can mask abusive traffic. Learn how to detect and block them effectively without impacting legitimate users.
By The APIGate Team•Oct 21, 2025•1 min readIntroduction
VPNs and proxies help preserve privacy — but in the API world, they’re often used to hide malicious or automated activity. Blocking or restricting these sources is essential for maintaining fair usage and preventing fraud.
1. The Challenge of VPN and Proxy Traffic
Attackers rotate through IP addresses from proxy networks, making IP-based rules alone insufficient. This allows bots, credential sharers, and scrapers to bypass restrictions effortlessly.
2. Identifying Suspicious Traffic Sources
- Frequent IP changes within short timeframes.
- Requests originating from data centers instead of ISPs.
- Geographical inconsistencies in user login patterns.
3. APIGate’s Built-in IP Reputation System
APIGate includes a preloaded IP reputation database with over 600 million known VPN, proxy, and spam IPs. It automatically filters suspicious sources, saving you from costly third-party services.
4. Fine-Tuning Your Controls
Instead of blocking all VPN users, APIGate allows flexible actions like “restrict” or “challenge” modes — letting you control access dynamically based on context and user behavior.
Conclusion
VPN and proxy abuse is one of the most overlooked API security issues. With APIGate’s intelligent IP reputation and geo-based access controls, you can enforce fair usage while maintaining a smooth experience for legitimate users.
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