IPv6是旨在解决IPv4时代IP地址资源不足而提出的新一代互联网协议。今天，大多数高校校园网和运营商提供的4G/5G，应该都支持了IPv6+IPv4，并且为了鼓励IPv6的使用，我校（包括许多兄弟学校）校园网采取的收费模式是IPv4收费，IPv6免费。因此将流量转化为IPv6，可以合规地实现校园网免流上网。

依据上述思路，本文利用Google Cloud Plantform(GCP) 提供的免费额度，通过Vless（Reality）协议，搭建IPv6代理服务器以实现校园网免流量。

另外，由于代理服务器在境外，故此方案顺便可以翻墙，一举两得解决两大困难，解锁高校网络的最佳体验。因此特别适用于以下情况：

已知缺点：

Now Let’s Start！

A VISA/Master Debit/Credit Card

A Computer

A network cable (Optional)

VPS is short for a virtual private server, to make it easy, you can consider it as a remote computer that is on and connected to the internet 24/7. Domestic and international Internet giants provide such cloud services, the most famous ones are Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, Alibaba Cloud, Tencent Cloud, and Huawei Cloud……

In order to go through the Great Fire Wall (GFW, the unofficial name for the censorship infrastructure set between China and the Internet, which bans you from Google), we might choose a VPS set out of China mainland. If you just need data fee-free domestic net access, you might choose a domestic VPS service. (Btw, you can use this method to pretend to be a resident in any province, to see if you will meet geographical discrimination on social media.)

Needless to say, the VPS must support IPv6. Internet Giants usually support IPv6. GCP has a $300-400 bonus for new users, so this time I will use it as an example.

Since all Google services have been locked by GFW since 2014, use any free VPNs temporally to go through the wall. If you don't know how to do it, consult your classmates.

Click this link https://cloud.google.com to log in to Google Cloud Platform Using your Google account. (If you do not have a Google account, just sign one up.)

You will need your Visa/Master card in this step to verify your identity, just follow the procedure, and you can successfully log in to the following console.

If you don't see the IPv6 setting in this guide, which means the default VPC network doesn't support IPv6, create a new VPC network.

Support any SSH Client (Putty, Xshell, Powershell, Terminal…..), the following code shows how to link to a remote VPS using the most traditional and common way, SSH in the terminal.

https://cloud.google.com/compute/docs/connect/add-ssh-keys

https://cloud.google.com/compute/docs/connect/standard-ssh

Google Cloud Platform also supports a modern browser shell, so you neither need to upload your public key nor need to use an SSH client for a secure connection. You can follow the document.

https://cloud.google.com/compute/docs/ssh-in-browser

When setting up your VPS on Google Cloud Platform (GCP), it's crucial to configure the firewall rules correctly. These rules control the incoming and outgoing network traffic to your VPS and ensure that only authorized traffic can access your server.

Keypoints

Incorrect configuration of firewall rules can lead to vulnerabilities or access issues. For example, overly restrictive rules might block legitimate traffic, causing services to be unreachable and leading to errors like a 502 Bad Gateway. Conversely, too permissive rules might expose your server to potential threats. Always double-check your configurations and test them to ensure they work as expected.

For Debian (Ubuntu included)

For CentOS (Red Hat)

x-ui is a beautiful and convenient configuration panel that supports a lot of protocols. It is the link to the project. https://github.com/FranzKafkaYu/x-ui/

Install

Method 2

V2rayN

Shadowrocket (iPad Version)

Shadowrocket

V2rayNG

Other clients may refer to Appendix 3.

Best Practice: (Speed Up to 1000Mbps!)

Other choices:

Students who have traveled internationally, or gone online oversea shopping might be familiar with these VISA/Master Cards. That usually includes several categories, including Credit, Debit, and Prepaid Debit.

According to regulations, now it is nearly impossible for a student without a paid job to get a V/M credit card from banks in China Mainland alone. Most undergraduate students are only allowed to open a UnionPay credit card without any overdraft, to be honest, these "fake" UnionPay credit cards are useless.

I highly recommend opening an attached card of your parent's credit account. You can share the overdraft limit of your parent and get all the benefits and convenience of a credit card. Both you and your parent can pay the credit card bill. The only drawback is that your parent can monitor your consumption. If you can not get an attached card, another recommendation is to apply for a VISA/Master Debit card, one of the popular choices is BOC Monet Debit (Mastercard).

However, if you are going abroad or to HK SAR in the near future, you may easily open such accounts in their bank branches. In Bank of America, you may even get a cash-back credit card without an SSN (Social Secure Number, similar to an ID number). In HK, you can easily open a digital bank account (like ZA Bank) using your phone.

Another choice is a prepaid VISA/Master debit card. Fintech companies like Wise, PayPal, and Venmo not only provide low-cost and fast financial services but may also provide prepaid debit, and you can even buy a prepaid debit card from most convenience stores in the US. However, it's hard to activate unless you already have a foreign-issued card or a valid foreign address or residence ID.

Another category of easy-to-apply VISA/Master debit is called USDT card, it was first designed to help cryptocurrency holders consume or withdraw cash safely, and with the increasing needs of GPT-4.0 subscriptions for non-US Users, they have been gaining popularity. But remember many of the USDT card companies are in a gray area or, worse: high service fees, no deposit insurance, taking money and running, disobeying foreign exchange management law, selling your personal data (if KYC is needed), and even involving in money laundering, so unless you totally understand the industry, that can be nightmares for any green hand users out of the crypto circle.

Open this link https://www.test-ipv6.com/ if you get 10 scores, then you have full access to the IPv6. OR Open https://byr.pt OR Manually check the network settings.

Others that support VLESS, XTLS, REALITY, XUDP, PLUX...

[1] https://github.com/XTLS/Xray-core

[2] https://v2rayssr.com/reality.html

[3] https://www.jixing.one/vps/get-a-vps/