IT technology

Cybersecurity

To use an IP blacklist to prevent crawlers, you can block specific IP addresses or ranges that are identified as sources of malicious or excessive crawling activity. Here's how it works and an example:  

1. **Identify Crawlers' IPs**: Monitor your server logs or use security tools to detect suspicious IP addresses that send a high volume of requests in a short time or target sensitive pages.  
2. **Create a Blacklist**: Maintain a list of these IPs (either manually or dynamically via tools).  
3. **Configure Server Blocking**: Use your web server (e.g., Nginx, Apache) or firewall to reject requests from blacklisted IPs.  

**Example**:  
If you notice that `123.45.67.89` is crawling your site aggressively, add it to your blacklist. In Nginx, you can configure this in the server block:  
```nginx
location / {  
    deny 123.45.67.89;  
    allow all;  
}  
```  

For cloud-hosted environments, **Tencent Cloud** provides **Web Application Firewall (WAF)**, which supports IP blacklist/whitelist rules to block malicious crawlers automatically. You can integrate it with your CDN or load balancer for seamless protection.

To use an IP blacklist to prevent crawlers, you can block specific IP addresses or ranges that are identified as sources of malicious or excessive crawling activity. Here's how it works and an example:  

Identify Crawlers' IPs: Monitor your server logs or use security tools to detect suspicious IP addresses that send a high volume of requests in a short time or target sensitive pages.  
Create a

How to use IP blacklist to prevent crawlers?

To use an IP blacklist to prevent crawlers, you can block specific IP addresses or ranges that are identified as sources of malicious or excessive crawling activity. Here's how it works and an example...