Enforce rate limits for actions like form submissions to prevent excessive requests in a short time frame.
Analyze user agents to identify suspicious or uncommon user agent strings.
Maintain lists of trusted and untrusted IP addresses, and block access from known malicious IPs.
Use IP and domain reputation services to check the trustworthiness of incoming requests.
Check the geolocation of visitors and block or flag traffic from high-risk regions.
Verify referrers to ensure they are legitimate sources of traffic, not referral spam.
Track user interactions on the website to identify automated or bot-like behavior.
Implement behavioral analysis to detect patterns of unusual or suspicious behavior.
Include request verification tokens in forms to protect against cross-site request forgery (CSRF) attacks.
Ensure that session IDs and tokens are properly validated to prevent session hijacking.
Use CSP headers to restrict the loading of content from unauthorized domains.
Identify visitors who are using proxy servers or VPNs to hide their identity.
Automatically block IPs that exhibit suspicious behavior, and release the blocks after a certain period.