Dorm WiFi Sharing: Bypassing Campus Network Restrictions

Preface

Dormitory broadband usually requires account login, making it impossible to share WiFi directly using a router. This article will introduce how to configure a router (using Padavan firmware as an example) to break through the campus network's "one person, one account" restriction.

Note: This tutorial is based on tests conducted with China Mobile Broadband (Pingfeng Campus). For other carriers, please refer to the methodology and configure independently.

Screenshots

Preparation

• Router (Recommended flashable models like Newifi 3, K2P, etc.)
• Immortal Breed
• Padavan firmware
• School broadband account and password
• Network cable

Cost Estimate: Approximately ¥150

Purchase Recommendations: Can be purchased on platforms like Taobao.

• If you are technically proficient, you can purchase a brand new, sealed device and flash it yourself.
• If you are unfamiliar with flashing, it is usually less hassle to purchase a device that already has Immortal Breed and Padavan firmware installed.

Tip: This article does not include flashing tutorials; please search for relevant information independently.

Initial Configuration and Router Usage

Important: If you find that you suddenly cannot connect to the internet after using the device normally for a period, your device may have been blocked. Solution: Enter the router backend → External Network (WAN) → Scroll down to find MAC Address → Click the + sign to modify your MAC address.

1. Unbinding Devices (Important)

First, connect to the official school WiFi Wlan-edu. After connecting, ignore the pop-up authentication window.

In the browser address bar, enter 192.168.210.100 to enter the User Self-Service System.

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. Once complete, disconnect from the Wlan-edu WiFi.

2. Connecting the Router

1. Power on the router.
2. Use a network cable to connect the wall network port (usually the prominent port dedicated to China Mobile Broadband) and the router's WAN port (usually the blue port).
3. After the router boots up, connect to its WiFi (the default SSID is usually PDCN or PDCN 5G).

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

Configuration Method

1. Logging into the Firmware Backend

After connecting to the router's WiFi, open a browser and enter: 192.168.123.1 in the address bar (the default backend address for Padavan firmware).

Enter the default account and password:

账号：admin
密码：admin

If you cannot log in

1. Please try changing your browser (Chrome is recommended).
2. Please check if you are correctly connected to the router's WiFi.

2. VPN Configuration

After logging into the backend, 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; for other campuses, please inquire independently)
3. User Name: hzxhaXXXXXXX (Pingfeng Campus defaults to hzxha + last eight digits of phone number)
4. Password: XXXXXX (Pingfeng Campus defaults to last six digits of phone number)

To prevent detection by the carrier (may not be effective), you can make the following setting:

• Find the Route forwarding without decreasing TTL option and change it to For all packets.

Click Apply at the bottom of the page to save the configuration.

3. Logging into the Campus Network

After saving the settings, wait a moment. Open any webpage; theoretically, it should automatically jump to the Campus Network login page.

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

Enter your account and password:

账号：学号
密码：身份证后八位 (或你修改后的密码)

After successful login, 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 ID card

2. Campus Network Login Page (for connecting)

• Address: 192.168.210.111
• Account: Student ID
• Password: Last eight digits of ID card

3. Router Backend (for configuration)

• Address: 192.168.123.1
• Account: admin
• Password: admin

This article may contain errors; feedback is welcome.