Alibaba Cloud ECS open security group port

Alibaba Cloud ECS By default, the ECS cloud server disables the firewall and uses its own security group. However, many friends are unfamiliar with this even if they are exposed to VPS. In this article, we will teach you how to use Alibaba Cloud ECS Open ports in the security group:

Where to set up security groups

First we need to know where to set up, enter the security group configuration, select the ECS server that needs to be configured – Security Group of this instance – Configuration Rules

Open all ports

For those who need to use Linux’s built-in firewall, for example, the Pagoda panel will automatically open the firewall for us. We can open all ports so that the security group will not affect our Linux settings

Mainly add 2 rules,

1. Open all ports in the inbound direction

2. Open all ports in the outbound direction

After adding the above two rules, all security groups will be released, and you will no longer receive any impact at this time

Open specific ports

Some friends think that security groups are very useful, so you can use them as your default firewall. Here is how to open ports in a specific range

For example, we sometimes use ports between 20-25, and we open them

The port range is the port you need to open. For example, 20/25 means ports 20, 21, 22, 23, 24, and 25

If you only want to open one port such as port 22, you can use 22/22

Then you need to pay attention to the authorization object. Generally, 0.0.0.0/0 is selected, which means that all IPs can be accessed

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