Basic Principles of Ad Blocking
NullPrivate uses DNS filtering technology to monitor and analyze network requests in real time. When an ad-related domain request is detected, the system automatically returns an empty address or a local loopback address, thereby preventing ad content from loading. This approach is both efficient and transparent to the user, without affecting normal browsing.
Intelligent Blacklist System
NullPrivate employs a multi-layer blacklist management mechanism:
- Auto-Update: The system periodically fetches the latest ad domain lists from trusted sources
- Category Management: Domains are classified by type—ads, trackers, malware, etc.
- Performance Optimization: Uses efficient matching algorithms for fast response
- Statistical Analysis: Provides detailed blocking statistics so you can see the protection in action
Flexible Whitelist Control
The whitelist feature offers precise access control:
- Access Protection: Only allows access to trusted sites
- Scenario Customization: Ideal for anti-addiction and enterprise network management
- Simple Configuration: Supports import/export for easy management
- Real-Time Effect: Changes take effect immediately without service restart
Usage Recommendations
- Start with the basic blacklist and adjust gradually
- Regularly review blocking statistics to understand system effectiveness
- Promptly add domains to the whitelist when false positives occur
- Customize filtering rules for special needs
Technical Details
DNS Filtering Mechanism
- Uses high-performance DNS response caching
- Supports IPv4 and IPv6 dual-stack filtering
- Millisecond-level local response speed
Rule Matching
- Exact domain matching
- Wildcard rule support
- Regular expression matching
Performance Optimization
- Memory-optimized data structures
- Concurrent request handling
- Intelligent caching mechanism