How to fix proxy getting automatic reset to http://127.0.0.1

Question

Answer 1

Hi Chi Wei Ang,

While you inserted your proxy there, what type of information did you enter to Address box? Is it an IP address / a domain or a full URL?

You should insert an IP address (example: 1.1.1.1) or a domain (example: example.com) to Address box, not a URL.

If you have any updates, please feel free to let me know.

Answer 2

Hi,

Please uninstall IObit Malware Fighter, restart Windows and run the following fixlist:

• Download fixlist.txt
• Save Fixlist.txt to the same folder as FRST64English.exe.
• Close all programs.
• Launch the Farbar Scanner tool and click "Fix".
• Restart Windows if prompted.
• Upload the output log file (FixLog.txt) in your next reply.

---

NOTE: The fixlist.txt script was written specifically for this user and for use on that particular machine. It is not recommended to run it on another machine, and don't run the same fixlist.txt more than once.

---

Answer 3

The proxy is being set to http://127.0.0.1 because a local proxy application (such as Dev Proxy or similar tooling) registers itself as the system proxy. When that proxy process is stopped incorrectly or keeps re-registering, Windows keeps the proxy value and network or apps may break.

To fix and prevent this:

1. Start the proxy tool again and close it cleanly using Ctrl + C (or the tool’s normal exit method). This unregisters it as the system proxy and restores normal network settings.
2. If the internet connection is already broken because the proxy crashed or was killed, repeat step 1: start the proxy, then stop it with Ctrl + C so it can remove its proxy settings.
3. If the proxy tool is only needed for specific development scenarios, configure it not to register as the system proxy:
   • In its configuration file (for Dev Proxy, devproxyrc.json), set:

          {
            "asSystemProxy": false
          }
     

   • Or start it with the equivalent command-line option (for Dev Proxy):

          devproxy --as-system-proxy false
     

   This prevents automatic changes to Windows’ proxy settings.
4. If some apps lose connectivity when the proxy is active, either:
   • Add their domains to the Windows proxy exceptions list so they bypass the proxy, or
   • Use the proxy only for specific processes instead of all system traffic (for Dev Proxy, use watchProcessNames/watchPids in the config).

These steps stop the proxy from continually resetting the LAN proxy to 127.0.0.1 and restore normal connectivity when the proxy is not in use.

---

References:

• Why is my internet connection not working after using the proxy
• Troubleshoot network interference (client-operating-system-windows)
• Troubleshoot Dev Proxy
• Troubleshoot network interference (client-operating-system-macos)