How to Resolve ERR_PROXY_CONNECTION_FAILED Error

Key Notes

  • Disable the proxy server settings on your LAN.
  • Remove faulty registry entries related to the proxy.
  • Reset Internet and TCP/IP settings to ensure connectivity.

Resolving ERR_PROXY_CONNECTION_FAILED: A Complete Troubleshooting Guide

The ERR_PROXY_CONNECTION_FAILED error indicates connectivity issues typically related to proxy settings. This guide will walk you through effective troubleshooting steps to resolve this problem.

Step-by-Step Guide to Resolve ERR_PROXY_CONNECTION_FAILED

Step 1: Disable the Proxy Server for Your LAN

Begin by accessing the Control Panel. Follow these steps:

  1. Press the Windows key, type Control Panel, and select Open.
  2. Select View by as Category, then click Network and Internet.
  3. Click on Internet Options.
  4. In the Internet Properties window, go to the Connections tab and click LAN settings.
  5. Uncheck the Use a proxy server for your LAN option.
  6. Also, remove the checkmark from the Automatically detect settings option.
  7. Click OK to save your changes.

Pro Tip: If the error persists in a specific browser, check for any unwanted extensions or temporarily disable antivirus software and VPN connections to troubleshoot further.

Step 2: Remove Registry Entries Related to Proxy Server

Follow these steps carefully, as editing the registry can affect your system:

  1. Press Windows + R to open the Run dialog.
  2. Type regedit and click OK.
  3. Before making any changes, back up the registry: go to File, then select Export to save a.reg file.
  4. Navigate to: Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
  5. Find Migrate Proxy, right-click it, and select Delete.
  6. Repeat this for Proxy Server, Proxy Override, and Proxy Enable.
  7. Close the Registry Editor and restart your PC.

Pro Tip: Deleting proxy-related registry entries often resolves many proxy issues. Always perform backups before changes.

Step 3: Reset Internet Settings

Resetting your Internet settings can restore original configurations:

  1. Press Windows + R to open the Run dialog.
  2. Type inetcpl.cpl and click OK.
  3. In the Internet Properties window, go to the Advanced tab and click Restore advanced settings.
  4. Go to the Security tab and click on Reset all zones to default level.
  5. Click Apply, then OK to save the changes.

Pro Tip: Resetting Internet settings can aid in resolving various connection issues not limited to proxy errors.

Step 4: Renew Your IP Address

To renew your IP address, follow these commands:

  1. Press the Windows key, type cmd, and select Run as administrator.
  2. Type the following commands, pressing Enter after each one:
    • ipconfig /release
    • ipconfig /flushdns
    • ipconfig /renew
  3. Once executed, type exit and press Enter to close the Command Prompt.

Pro Tip: This step can help address connection issues frequently tied to DHCP lease problems.

Step 5: Reset TCP/IP Configuration

To reset your TCP/IP, do the following:

  1. Press the Windows key, type cmd, and select Run as administrator.
  2. Copy and paste the following commands one-by-one, hitting Enter after each:
    • netsh winsock reset
    • netsh int ip reset
  3. After execution, close the Command Prompt window and reboot your PC.

Pro Tip: Resetting Winsock can help to restore your TCP/IP settings, especially if various networking issues occur.

Step 6: Reset Your Network Connection

Follow these steps to reset your network connection:

  1. Press Windows + I to open the Settings app.
  2. Select Network & Internet from the left pane, then click Advanced Network Settings.
  3. Click Network reset.
  4. On the next screen, click the Reset now button.
  5. Confirm the action if prompted.

Pro Tip: Resetting your network connection can fix various issues, including corrupt configurations.

Step 7: Reconfigure TCP/IP Settings

Perform the following commands to adjust TCP/IP settings:

  1. Press the Windows key, type cmd, and select Run as administrator.
  2. Input the following commands and hit Enter after each:
    • netsh int tcp set heuristics disabled
    • netsh int tcp set global autotuninglevel=disabled
    • netsh int tcp set global rss=enabled
  3. Close the Command Prompt.

Pro Tip: Disabling TCP heuristics and enabling RSS can improve performance and stability.

Additional Tips

  • Ensure your network drivers are updated.
  • Consider performing a malware scan to rule out any interference.
  • Check other devices on your network to verify if the issue is isolated.

Summary

In this guide, we’ve explored how to tackle the ERR_PROXY_CONNECTION_FAILED error through various methods. From disabling proxy settings to resetting TCP/IP configurations, these steps should help restore your internet connectivity.

Conclusion

Encountering the ERR_PROXY_CONNECTION_FAILED error can be frustrating, but by systematically following these troubleshooting steps, users can resolve their connectivity issues effectively. For further assistance or if you have questions, feel free to leave your comments below!

FAQ (Frequently Asked Questions)

What causes the ERR_PROXY_CONNECTION_FAILED error?

The error is commonly related to incorrect proxy settings, malware interference, or corrupt network configurations.

Can I fix this error without administrator privileges?

While some steps require administrator access, many initial troubleshooting actions can be performed without it.