How to quickly unblock the IP blocked by Tencent Cloud lightweight application server due to DDoS

Tencent Cloud Light Application Host comes with very little DDoS defense. Once the protection threshold is exceeded, your IP will be blocked and will be automatically unblocked after 24 hours. You cannot apply for self-service quick unblocking. Today, this site will share how to quickly unblock IPs blocked by two Tencent Cloud lightweight application hosts due to DDoS, so that your website can go online quickly.

1. Tencent Cloud lightweight application host DDoS attack leads to IP blocking

When your Tencent Cloud lightweight application host is attacked and exceeds the gifted protection threshold, your IP will be blocked, that is, the IP cannot be connected, the host cannot be accessed, and the website will naturally be offline.

Tencent Cloud will also send you corresponding IP blocking notifications caused by DDoS attacks

Dear Tencent Cloud users, hello! The machine (IP: 124.156.*.*, ID: lhins-sljfs, name: sifslfew, region: Hong Kong, China) belonging to your Tencent Cloud account (account ID: ******, nickname: ***) suffers A large-traffic DDoS attack has exceeded the protection threshold limit provided by Tencent Cloud and has been blocked. The details are as follows: Blocking time: 2021-08-12 08:31:53 (GMT+08:00), Estimated unblocking time: 2021-08-13 08:31:53 (GMT+08:00), Attack traffic peak: 1218Mbps, Blocking type: Carrier blocking.

After Tencent Cloud Light is attacked by DDoS, it can only wait 24 hours for self-service unblocking. As shown in the figure below, there is no self-service unblocking quota:

2. How to quickly unblock the blocked IP of Tencent Cloud lightweight application host

According to the experience of this site, if you want to get your website online quickly, there are two solutions, both of which require the use of Tencent Cloud's custom mirror function.

The first step of both methods is to create a custom image based on the attacked host. For detailed tutorials, please refer to: "Tutorial on Creating a Custom Image for Tencent Cloud Lightweight Application Host".

Method 1. Create an instance using a custom image

This method is to buy a new Tencent Cloud lightweight application host and use [custom image] when selecting the image. Because Tencent Cloud lightweight application hosts support monthly payment, the cost is not very high. Details Tutorial: "Tutorial on using custom images to create Tencent Cloud lightweight application hosts"

Method 2: Use custom image to reset the application

If you have an idle Tencent Cloud lightweight application host in the same region, you can reset the application on this lightweight application host.

On the lightweight application host management page, select [Reset Application]:

Select [Custom Image] and select the image you just created:

Both methods can get a new host that is exactly the same as the original host (the attacked host) except for the IP address. At this time, we only need to modify the IP address of the domain name resolution to get the website back online.

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