---
title: "Sharing Dorm WiFi: Bypassing Campus Network Restrictions"
description: "This article explains how to flash third-party firmware (such as Padavan firmware) and configure L2TP to bypass the school’s one-account-per-person network restriction (using China Mobile broadband at the Pingfeng campus as an example), enabling shared WiFi in the dormitory."
canonical_url: https://ro.yikzero.com/en/blog/dorm-router/
locale: en
date: 2020-04-21
---

# Sharing Dorm WiFi: Bypassing Campus Network Restrictions

## Preface

Dormitory broadband generally requires account login, which makes it impossible to directly use a router to share WiFi. This article will introduce how to configure a router (using **Padavan firmware** as an example) to bypass the campus network’s “one account per person” restriction.

> **Note**: This tutorial is tested based on **China Mobile broadband** (Pingfeng Campus). For other carriers, please refer to the general approach and configure it yourself.

## Screenshots

![Physical photo of the router](https://cdn.yikzero.com/markdown/images/1565839237.png)

## Preparation

- Router (recommended flashable models such as **Newifi 3**, **K2P**, etc.)
- **Breed bootloader**
- **Padavan firmware**
- School broadband account and password
- Ethernet cable

> **Cost estimate**: About ￥150

**Purchase advice**:
You can purchase them on platforms such as Taobao.
* If you are good at hands-on work, you can buy a **brand-new unopened** device and flash it yourself.
* If you are not familiar with flashing firmware, please buy a device that already has **Breed bootloader** and **Padavan firmware** flashed; it is usually more hassle-free.

> **Tip**: This article does not include a firmware flashing tutorial. Please search for relevant materials yourself.

## Initial Configuration and Router Usage

> **Important**: If, after normal use for a period of time, you suddenly find that you cannot connect to the Internet, your device may have been blacklisted.
> **Solution**: Enter the router admin panel → **External Network (WAN)** → scroll down to **MAC Address** → click the `+` icon to change your MAC address.

### 1. Unbind the Device (Important)

First, connect to the school’s official WiFi `Wlan-edu`. After connecting, ignore the authentication window that pops up.

Enter `192.168.210.100` in the browser address bar to access the **User Self-Service System**.

![Login system interface](https://cdn.yikzero.com/markdown/images/3877436746.jpg)

```plain
账号：学号
密码：身份证后八位 (或你修改后的密码)
```

After logging in, find and click **Unbind All MAC Addresses**. After completing this, disconnect from the `Wlan-edu` WiFi.

![Unbind all MAC addresses](https://cdn.yikzero.com/markdown/images/127070192.jpg)

### 2. Connect the Router

1.  Power on the router.
2.  Use an Ethernet cable to connect the network port **on the wall** (usually the protruding port dedicated to China Mobile broadband) to the router’s **WAN port** (usually the blue port).
3.  After the router starts up, connect to its WiFi (the default SSID is usually `PDCN` or `PDCN 5G`).

```plain
默认Wifi名称：PDCN 或 PDCN 5G
默认密码：1234567890
```

## Configuration Method

### 1. Log in to the Firmware Admin Panel

After connecting to the router WiFi, open a browser and enter `192.168.123.1` in the address bar (the default admin address of **Padavan firmware**).

![Login popup](https://cdn.yikzero.com/markdown/images/3199039527.jpg)

Enter the default account and password:

```plain
账号：admin
密码：admin
```

**If you cannot log in**

> 1. Please try switching browsers (Chrome is recommended).
> 2. Please check whether you have correctly connected to the router WiFi.

### 2. VPN Configuration

After logging in to the admin panel, find and click **External Network (WAN)** in the left menu.

On the **External Network (WAN)** settings page, configure as follows:

1.  **WAN Connection Type**: Select `L2TP`
2.  **VPN Server**: `192.168.113.1` (Pingfeng Campus; please look it up yourself for other campuses)
3.  **Username**: `hzxhaXXXXXXX` (Pingfeng Campus defaults to `hzxha` + the last eight digits of your phone number)
4.  **Password**: `XXXXXX` (Pingfeng Campus defaults to the last six digits of your phone number)

![VPN configuration interface](https://cdn.yikzero.com/markdown/images/4129165676.jpg)

To prevent detection by the carrier (not necessarily effective), you can configure the following:

* Find the **Do not decrement TTL for routed packets** option and change it to **For all packets**.

![Change to for all packets](https://cdn.yikzero.com/markdown/images/3452305555.jpg)

Click **Apply settings on this page** at the bottom of the page to save the configuration.

### 3. Log in to the Campus Network

After saving the settings, wait a moment. Open any webpage, and theoretically it will automatically redirect to the **campus network login page**.

> **Tip**: If it does not redirect automatically, manually enter `192.168.210.111` in your browser.

![Redirect to this page](https://cdn.yikzero.com/markdown/images/3204033419.jpg)

Enter your account and password:

```plain
账号：学号
密码：身份证后八位 (或你修改后的密码)
```

![Login successful page](https://cdn.yikzero.com/markdown/images/956320776.jpg)

After logging in successfully, you can share the network through the router.

## Information Summary

**1. User Self-Service System (for unbinding)**
* Address: `192.168.210.100`
* Account: Student ID
* Password: Last eight digits of your ID card number

**2. Campus Network Login Page (for Internet access)**
* Address: `192.168.210.111`
* Account: Student ID
* Password: Last eight digits of your ID card number

**3. Router Admin Panel (for configuration)**
* Address: `192.168.123.1`
* Account: admin
* Password: admin

There may be errors in the article; corrections are welcome.