SecretDNS 3.9.1 Update

The SecretDNS (3.9.1) has been updated.

• Recommended Options allow you to make exceptions for only the necessary sites for a smoother experience.

• Minimizes speed degradation by fragmenting only the SNI strings.
• Only designated domains can use SNI fragmentation and DNS functionalities.
• Use DNS servers without changing Windows settings.
• Easily check the domains you are connected to.
• Can be used in conjunction with proxy functionality.
• Can be used without installation.

Homepage

• SecretDNS: https://secretdns.kilho.net

Recommended Options

1. DNS Settings - Encryption (DOH)
2. SNI Settings - Fragmentation (Manual)
3. Designated List - Enter domains to bypass

History

• Version 3.9.1 (2026/06/12)
  - Fragmentation extension feature applied to all internet environments including KT internet users
  - Changed to have fragmentation extension feature activated by default during new installations
  
• Version 3.9.0 (2026/05/23)
  - Addressed execution and display issues caused by errors in some security programs like nProtect, Fasoo, MarkAny
  - Removed loading display that could conflict with certain security programs
  - Improved stability to execute more reliably even in environments with security program errors
  
• Version 3.8.9 (2026/04/28)
  - Improved termination and restart issues in some user environments
  - Enhanced response to delays and exceptions occurring on specific PCs
  - Overall improved stability and operational reliability
  
• Version 3.8.8 (2026/04/06)
  - Improved to prevent crashes due to incorrect operation of Fasoo DRM in advance
  - Added frequently used sites to the whitelist significantly to enhance connectivity
  - Improved the whitelist processing method to streamline the setting application flow
  - Separated user list and default list for a more stable operating structure
  - Provided a stable execution environment across various environments
  
• Version 3.8.7 (2026/03/17)
  - Improved execution and termination actions through internal structure cleanup
  - Enhanced processing for exceptions/designated lists during execution
  - Improved network operation stability
  

Related Links

• Update Guide: https://kilho.net/archives/notice/2940
• iPhone Bypass: https://gnu.kilho.net/tiptech/1330

License

• SecretDNS is Freeware.
• You can use it freely without space constraints at companies, homes, public offices, schools, etc.
• It can be distributed freely anywhere.

Download

• Download from Kilho.net
• Download for Android

Frequently Asked Questions (FAQ)

• Why is it good to use Recommended Options?
  It allows easy use of features such as DNS tampering prevention and SNI eavesdropping bypass while ensuring both speed and security.
• Does the SNI fragmentation feature slow down the speed?
  No. This program minimizes speed degradation by fragmenting only the SNI strings.
• Does the DNS setting change the Windows system settings?
  No. It uses its own DNS settings (DNS over HTTPS) without changing Windows settings for stability and safety.
• What should I do if I can't access a specific site?
  You can minimize access issues by setting a whitelist or designated domain list.
• Can I use it without installation?
  Yes. A portable version is provided, so you can use it right away without the installation process.