Recently, Alibaba Cloud has been constantly alarming. Fortunately, I am not using Alibaba Cloud or Tencent Cloud's CDN, otherwise I cannot afford the cost. I put a shell on it, then control the traffic to 100G, so that the access becomes slow, or directly inaccessible, to avoid being charged after exceeding the traffic limit.
Modify SSH to avoid using accounts like root or admin, and use passwords that combine uppercase and lowercase letters, numbers, and special characters.
I don't know if it can hold up this time, we'll see later.