SecretDNS Update 3.9.1

SecretDNS (3.9.1) has been updated.

• Using the recommended options allows you to enjoy a smooth experience by making exceptions for only the necessary sites.

• The SNI strings are fragmented to minimize speed degradation.
• Only designated domains can have SNI fragmentation and DNS functions applied.
• Use DNS servers without changing Windows settings.
• Easily verify the domains you have accessed.
• Used in combination with proxy features.
• Can be used without installation.

Homepage

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

Recommended Options

1. DNS Settings - Encryption (DOH)
2. SNI Settings - Fragmentation (Custom)
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 activate the fragmentation extension feature by default during new installations
  
• Version 3.9.0 (2026/05/23)
  - Addressed execution and display issues caused by some security programs like nProtect, Fasoo, MarkAny
  - Removed loading display that could conflict with certain security programs
  - Improved stability for execution in environments with security program errors
  
• Version 3.8.9 (2026/04/28)
  - Improved issues related to termination and restart that occurred in certain user environments
  - Strengthened response to delays and exceptions appearing on specific PCs
  - Enhanced overall stability and operational reliability
  
• Version 3.8.8 (2026/04/06)
  - Improved to prevent crashes caused by incorrect behavior of Fasoo DRM
  - Significantly added frequently used sites to the whitelist for smoother access
  - Streamlined the flow of settings application with improved whitelist processing
  - Separated user lists and default lists for a more reliable operational structure
  - Provided stable execution environment in various conditions
  
• Version 3.8.7 (2026/03/17)
  - Improved execution and termination actions through internal restructuring
  - Enhanced the exception/designated list handling 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.
• Can be freely used in any space, such as companies, homes, public offices, and schools.
• 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 access to features like DNS tampering prevention and SNI circumvention, while improving both speed and security.
• Does SNI fragmentation slow things down?
  No. This program only fragments SNI strings to minimize speed degradation.
• Does the DNS setting change Windows system settings?
  No. It uses its own DNS settings (DNS over HTTPS) without changing Windows settings for stable and secure operation.
• What should I do if a specific site can't be accessed?
  By setting up a whitelist or designated domain list, you can minimize access issues.
• Can I use it without installation?
  Yes. It provides a no-install version that can be used immediately without installation processes.