Important Notice: Tell me your IP before using SSR Blog Posted on Apr 13 2020 [点击查看中文版本 Click Here to Read the Chinese Version ](https://blog.hiaoxui.com/blog/post/hiaoxui/whitelist-notice-zh) To combat the active detection of GFW, I will build a whitelist firewall to filter out all the packets with unknown source. If you're using my service, please read: 1. If you're using IPv6, no operation is needed. IPv6 traffic will not be filtered. 2. If your device is connected to PKU network, you don't need to do anything in theory. I've added all IPs of PKU (including health center) to the whitelist in advance. 3. If you're using Windows, no operation is needed in theory. Read the following if it doesn't work. 4. If you're using Linux, OS X, Android, iOS, please login to your profile page **every time before using SSR**. After this, your IP will automatically be registered and be broadcast to the distributed nodes. Don't use any proxy when visiting the profile page, or I by no means know your actual IP. Refer to this [blog](https://blog.hiaoxui.com/blog/post/hiaoxui/whitelist-tech) for technical details.