Fraudsters use proxies to hide their identity, bypass IP address blacklists and prevent detection. Detecting users behind proxy server detection API is a critical tool for fraud scoring, risk management and user behavior analysis.
How do you detect if a user is using a proxy?
One way to detect proxy usage is through HTTP headers. Proxies often add X-Forwarded-For and other headers to requests, which are easily detected by web servers. This is an easy way to flag connections as proxy use, although it’s not 100% reliable.
Another method for proxy detection is to compare the browser’s User-Agent against the IP address of the device it is connecting from. If the browser is spoofing its User-Agent, this can indicate a proxy server is being used.
In addition to proxy detection, Varonis also analyzes data from file systems and the network to look for signs of malicious activity. The combination of these threat intelligence layers can help protect your business from data breaches and other cyber-attacks.
Our industry leading IP reputation API uses real-time lookups to detect proxies, VPNs, Tor exit nodes and more. The API supports live lookups on demand from any type of user action, such as submitting a form, and can be deployed in a variety of ways. The API also identifies VPN providers, data centers and other sources of malicious traffic. This helps you to block or require additional verification for high-risk IP addresses.