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When you create an instance, such as ECS, cloud container, or database, you need to add the instance to a security group. To delete a security group, you must remove all instances from the security group first.
On the Linux ECS, run the following command to check whether the ECS listens on the port: If the ECS does not listen on the port, the ECS communication may be adversely affected. netstat -na | grep <Port number> Submitting a Service Ticket If the problem persists, submit a service
After a container is migrated to another ECS, you need to add routes to the route table of the ECS VPC. Add security group rules.
log in to the ECS to upload or download files.
Why Can't My ECS Use Cloud-init? Why Can't My ECS Access the Internet Even After an EIP Is Bound? Why Is My ECS Unable to Communicate at a Layer 2 or Layer 3 Network? How Do I Handle a BMS Network Failure? Why Does My ECS Fail to Obtain an IP Address?
Verification Log in to ECS 1 and then access your on-premises data center from ECS 1. Check whether ECS 2 can receive packets sent from ECS 1 to the data center. Check whether the packets pass through and are filtered by the firewall on ECS 2. Parent topic: VPC Security
Table 1 Viewing and deleting resources in a subnet Resource Reference ECS You cannot jump to the target ECS from the current page. To delete an ECS from the subnet, you need to go to the ECS console, search for the target ECS in the ECS list, and delete it.
Application Examples Example 1: Creating a VPC and Subnet for an ECS Example 2: Configuring a Security Group for an ECS Example 3: Assigning a Virtual IP Address to an ECS for HA Example 4: Assigning a Virtual IPv6 Address to ECSs for HA
If the ECS's network interface has no IP address assigned, see Why Does My ECS Fail to Obtain an IP Address? Check whether the subnet gateway of the ECS can be pinged. In the ECS list, click the ECS name. The ECS details page is displayed.
You can configure the public bandwidth when creating an ECS or bind an EIP to an ECS after the ECS is created. Public bandwidth is classified into inbound bandwidth and outbound bandwidth.
Click Service List and click Elastic Cloud Server under Computing. In the ECS list, click the name of the ECS. On the displayed ECS details page, click the Network Interfaces tab. Ensure that Source/Destination Check is disabled.
How Do I Access an ECS with an EIP Bound from the Internet? What Is the EIP Assignment Policy? Can I Bind an EIP of an ECS to Another ECS? Can I Buy a Specific EIP? How Do I Query the Region of My EIPs?
Can I Change the VPC of an ECS? Why Is the ECS IP Address Released After the System Time Is Changed? How Do I Change the DNS Server Address of an ECS?
Example Request Change the route table whose ID is 3d42a0d4-a980-4613-ae76-a2cddecff054, add a route with next hop type of ECS, modify the route with next hop type of ECS, and delete the route whose destination is 20.20.10.0/24.
Network Interface Configuration Examples Binding an EIP to the Extended Network Interface of an ECS to Enable Internet Access Configuring Policy-based Routes for an ECS with Multiple Network Interfaces Parent Topic: Elastic Network Interface and Supplementary Network Interface
Figure 1 VPC and related services Table 1 Related services Service Interaction Function Elastic Cloud Server (ECS) Using Security Groups to Protect ECS Network Security Elastic IP (EIP) Using an EIP to Connect a VPC to the Internet NAT Gateway Using a Public NAT Gateway to Connect
If the active ECS goes down, the standby ECS becomes the active ECS and continues to provide services. Notes and Constraints All servers of the HA cluster must be in the same subnet.
If the active ECS is faulty and cannot provide services, the virtual IP address will be dynamically switched to the standby ECS to continue providing services. Skip this step if the ECS where the firewall is deployed does not need to work in the active/standby mode.
Can I Change the Security Group of an ECS?
You need to select such an ECS to use an IPv4/IPv6 dual-stack network. On the ECS console, click Buy ECS. On the displayed page, check the ECS flavors. If Yes is shown in the IPv6 column, the ECS with this flavor supports IPv6.
