Aliyun How to create a security group

　　Aliyun How to create a security group

Aliyun for users to better improve the flexibility of user network control. Security group functionality is provided at the top of the operating system.

Security groups, similar to the virtual Firewall feature, are used to set up network access control for single or multiple ECS instances, which is an important security isolation tool. When you create an ECS instance, you must select a security group. You can also add security group rules to network control of the direction and direction of all ECS instances under the security group.

For security groups that you create yourself, the intranet, public-network default rules are out of direction accept all, in the direction of all, before the task security group rule is added.

The default security group configuration has ensured that the server is functioning properly for network interaction. However, the incorrect security group rule configuration may cause unexpected server network access.

For configuration of security groups, see authorizing security groups.

The operation is as follows:

Log on to the Cloud Server Management Console.

Click a security group in the left navigation.

Select a region.

Click Create Security Group.

In the pop-up dialog box that creates the security group, enter the following information:

The name of the security group, with a length of 2-128 characters, preceded by uppercase or lowercase letters or Chinese, which can contain numbers, ".", "_" or "-".

A description of a security group that is 2-256 characters long and cannot begin with http://or https://.

Select a network type. Network types are classic networks and proprietary networks, and if you choose a proprietary network, you need to select a specific proprietary network. If you have not yet created a proprietary network under your current geography, you need to create a proprietary network first.

Click OK, a security group is created and completed.