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Disable insecure connections

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Works with Windows 10 and 11Works with Windows Vista, XP, 7, 8, 10, 11, and Windows Server 2008 or newer.
  • Windows onlyThis script improves your privacy on Windows
  • Multiple actionsThis page belongs to a category, containing some changes with similar goal.
  • Impact: Minimum

    System Functionality / Data Loss Risk: Low

    This action improves privacy with minimal impact when you run the recommended script.

  • Batch (batchfile)These changes use Windows system commands to update your settings.
  • 17 scripts
  • 3 categories
  • Administrator rights requiredThis script requires privilege access to do the system changes
  • Fully reversible

    You can fully restore this action (revert back to the original behavior) using this website.

    The restore/revert methods provided here can help you fix issues.

Overview​

This category includes scripts designed to enhance users' security and privacy by disabling outdated or vulnerable connections across the system. It safeguards data against interception, unauthorized access, and attacks that exploit outdated technology vulnerabilities, including man-in-the-middle attacks and data breaches.

By disabling these insecure connections, these scripts follow cybersecurity best practices and recommendations. Although Windows supports insecure connections for compatibility, prioritizing security, these scripts disable them.

Caution

This may cause compatibility issues with older devices or software.

Safe for General Use
This script has Normal protection level option. This is recommended for all users to improve without any noticeable impact on the system functionality.

Apply Now​

Choose one of two ways to apply:

Download script​

Download and run the script directly
  • No app needed
  • Offline usage
  • Easy-to-apply
  • Free
  • Open-source

Normal — Everyday Privacy (Enterprise-Grade)​

  • Recommended for all
  • Safe for daily use
  • No impact on system stability

Read more about Normal and other protection levels

Help

How to apply or restore "Disable insecure connections" using script​

  • ≈ 2 min to complete
  • Tools: Web Browser
  • Difficulty: Simple
  • ≈ 6 instructions
  1. 1

    Choose protection

    Choose one of the options with different impact levels:

    • Normal

      Some safe changes minimal system impact.

    • High

      Some potentially impactful changes with moderate system impact.

    • Maximum

      Some impactful changes with high system impact.
  2. 2

    Download

    Download the script file by clicking on the   Apply protection  button above.
    Use   Undo protection button above to restore changes.
  3. 3

    Keep the file

    If warned by your browser, keep the file.
  4. 4

    Open

    Open the downloaded file.
  5. 5

    Exit

    Once it's done, press any key to exit the window.
  6. 6

    Restart

    Restart your computer for all changes to take effect.

Apply with privacy.sexy​

Guided, automated application with safety checks
  • Recommended for most users
  • Includes safety checks
  • Shows the code
  • Free
  • Open-source
  • Popular
  • Offline/Online usage
Open privacy.sexy
Help

How to apply or restore "Disable insecure connections" using privacy.sexy​

  • ≈ 3 min to complete
  • Tools: privacy.sexy
  • Difficulty: Simple
  • ≈ 4 instructions
privacy.sexy is free and open-source application that lets securely apply this action easily with more advanced options.
  1. 1

    Open or download

    Open or download the desktop application
  2. 2

    Choose script

    1. Search for the category name: Disable insecure connections
    2. Check the category by clicking on the checkbox of the category.

    Applying Normal to limit the impact.

  3. 3

    Run

    Click on ▶️ Run button at the bottom of the page.

    This button only appears on desktop version (recommended). On browser, use 💾 Save button.

Explore This Guide​

  • 17 Privacy settings
  • 3 Main categories
    • These settings are organized into 3 main categories for easy navigation.
    • Each main category contains subcategories, helping you find specific settings you might want to adjust.
  • 3 Total categories

Choose what to protect based on your needs:

Click any option to learn more about what it does.

Each change can be applied and reversed individually.

  • Some settings and commands may require technical knowledge to apply correctly.
  • Most users find the Normal protection above sufficient.

Disable insecure ciphers

This category improves network security by disabling outdated and less secure cipher suites. Cipher suites are sets of cryptographic algorithms used to secure network connections. They include ciphers, known as bulk encryption algorithms or simply bulk ciphers. Ciphers encrypt messages exchanged between clients and servers. Using outdated cipher suites exposes data to risks of interception and tampering during transmission. Disabling insecure ciphers meets security standards set ...

Disable insecure hashes

This category includes scripts to disable insecure hash algorithms during cryptographic operations. Hash algorithms are essential for internet security, electronic banking, and document signing. Insecure hashes, however, are susceptible to collision attacks. This vulnerability enables attackers to spoof content, perform phishing, or execute man-in-the-middle attacks. Consequently, an attacker could intercept or modify data transmitted over what is believed to be a secure connection, without bein...

Disable insecure protocols

This category focuses on enhancing user privacy by disabling legacy and insecure communication protocols. It targets protocols that expose users to security vulnerabilities due to their outdated nature. Retaining obsolete protocols creates a false sense of security because they may seem secure but are vulnerable to exploitation. Authorities like NIST (FIPS), NSA (National Security Agency), Office of the Chief Information Security Officer, Microsoft, Mozilla, PCI Security Standards Council, the C...

Disable insecure renegotiation

This script enhances your security by reducing risks associated with secure communications. By running this script, you proactively enhance your online privacy and secure against well-known TLS vulnerabilities. TLS secures internet communications. It allows parties such as browsers and websites to update their encryption settings through renegotiation. Without safeguards, attackers could intercept and compromise these communications. Insecure renegotiation can let attackers hijack communicat...

Disable insecure connections from .NET apps

This script improves security by enforcing secure network connections across all .NET applications. By setting the "SchUseStrongCrypto" configuration, it prevents the use of outdated and insecure connections, including: Protocols weaker than TLS 1.1 and TLS 1.2. • Cipher algorithms such as RC4, NULL, DES, and export suites. • Hash algorithms like MD5. Authorities like Microsoft, and Department of Defense (DoD) recommend this configuration as part of their security guidelines. This script applies...

Similar Guides​

Wider Goal​

Guides below includes this guide to achieve a wider goal.

See other more general settings that includes this one as one of its actions.

These plans combine multiple privacy settings, including this one, for stronger protection.

This category is dedicated to improving network security. It aims to minimize vulnerabilities by offering various settings that improve the integrity and confident...
Visit category page

Same Goal​

Other guides in Improve network security 

See settings that are in the same category as this guide.

Using other actions in the same category may help you achieve your goal better.

Enable strong secret key requirements
Enable secure connections
Disable insecure remote administration access
Disable non-essential network components

About the Creators​

These people have authored this documentation and written its scripts:

  • Avatar of undergroundwires. The creator of PrivacyLearn and privacy.sexy. Black and white portrait showing a person wearing a polka dot tie and suit jacket, reflecting the professional expertise behind the privacy protection tools.
    • Certified security professional
    • 7+ years experience securing banks
    • Open-source developer since 2005
    • EU advisor, Public Speaker, Moderator
    • Hundreds across the globe
    • Testers, reviewers, developers
    • Companies, military agencies
    • Community since 2017
About Us

Reviewed By​

This guide has undergone comprehensive auditing and peer review:

  • Expert review by undergroundwires​

    • Verified technical accuracy and editorial standards
    • Assessed system impact and user privacy risks

  • Public review by large community​

    • Privacy enthusiasts and professionals peer-reviewed
    • Millions of end-users tested across different environments

History​

We continually monitor our guides, their impact and all other privacy options. We update our guides when new information becomes available. On every update, we publicly store who made the change, what has been changed, why the change was made and when the change was made.

Review Change History Our Change Process