Extracting PPPoE Credentials from FiberHome HG6145F Router

This guide explains how to extract your PPPoE username and password from a FiberHome HG6145F router (commonly used by 3BB ISP in Thailand).

Why You Might Need This

Setting up your own router in bridge mode
Replacing ISP router with your own hardware
Backing up your ISP credentials

Prerequisites

Access to the router's admin web interface (usually http://192.168.1.1)
Admin login credentials for the router
A modern web browser (Chrome, Firefox, Edge)

Steps

1. Log into the Router

Open your browser and navigate to http://192.168.1.1 (or your router's IP address). Log in with your admin credentials.

2. Navigate to Broadband Settings

Go to Network > Broadband Settings > Internet Settings

This step is important because the decryption function (fhdecrypt) is only loaded when this page is open.

3. Open Browser Developer Tools

Chrome/Edge: Press F12 or Ctrl+Shift+J (Windows) / Cmd+Option+J (Mac)
Firefox: Press F12 or Ctrl+Shift+K (Windows) / Cmd+Option+K (Mac)

Go to the Console tab.

4. Run the Extraction Script

Paste the following script into the console and press Enter:

fetch('/cgi-bin/ajax?ajaxmethod=get_allwan_info')
  .then(r => r.text())
  .then(text => {
    // Extract username and password with regex
    let username = text.match(/"Username":\s*"([^"]+)"/)?.[1];
    let encPass = text.match(/"Password":\s*"([^"]+)"/)?.[1];

    // Get decrypt function from iframe
    let iframe = document.querySelector('iframe[name="broadband_inter"]') ||
                 document.querySelector('iframe[src*="broadband"]');
    let decrypt = iframe?.contentWindow?.fhdecrypt;

    console.log("=== PPPoE Credentials ===");
    console.log("Username:", username);
    console.log("Password:", decrypt ? decrypt(encPass) : encPass);
  });

5. Copy Your Credentials

The console will display your PPPoE username and decrypted password:

=== PPPoE Credentials ===
Username: youruser@3bb
Password: yourpassword

Troubleshooting

Password shows as hex string (not decrypted)

If the password appears as a long hex string like FADC3B97108B781826E297B1B8C1E60C, the decryption function wasn't found. Make sure you're on the Broadband Settings page before running the script.

Script returns undefined

Ensure you're logged into the router admin panel
Try refreshing the Broadband Settings page and running the script again

Cannot find iframe

Some firmware versions may have different iframe names. Try this alternative:

// List all iframes to find the correct one
document.querySelectorAll('iframe').forEach((f, i) => {
  console.log(i, f.name, f.src);
  try {
    if (f.contentWindow.fhdecrypt) console.log("  ^ Has fhdecrypt!");
  } catch(e) {}
});

Applicable Router Models

This method may work on other FiberHome routers with similar firmware:

HG6145F / HG6145F1 / HG6145F3
HG6245D
HG6145D / HG6145D2
HG6143D / HG6143D3
HG6243C
HG6245N
AN5506 series

Security Notes

These are YOUR credentials for YOUR internet connection
Store them securely (password manager recommended)
This method only works with physical/network access to the router
The PPPoE password is stored encrypted on the router and decrypted client-side

g1ibby/fiberhome-hg6145f-pppoe-extract.md

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