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          • Manually Configuring IPv4 and IPv6 Policy-based Routes for a Linux ECS with Multiple Network Interfaces (Ubuntu) - Virtual Private Cloud

            Manually Configuring IPv4 and IPv6 Policy-based Routes for a Linux ECS with Multiple Network Interfaces (Ubuntu) - Virtual Private Cloud

            For details, see How Do I Log In to My ECS?

            Help > Virtual Private Cloud > User Guide > Elastic Network Interface and Supplementary Network Interface > Network Interface Configuration Examples > Configuring Policy-based Routes for an ECS with Multiple Network Interfaces
          • Manually Configuring IPv4 and IPv6 Policy-based Routes for a Linux ECS with Multiple Network Interfaces (CentOS) - Virtual Private Cloud

            Manually Configuring IPv4 and IPv6 Policy-based Routes for a Linux ECS with Multiple Network Interfaces (CentOS) - Virtual Private Cloud

            For details, see How Do I Log In to My ECS?

            Help > Virtual Private Cloud > User Guide > Elastic Network Interface and Supplementary Network Interface > Network Interface Configuration Examples > Configuring Policy-based Routes for an ECS with Multiple Network Interfaces
          • Why Is the ECS IP Address Released After the System Time Is Changed? - Virtual Private Cloud

            Why Is the ECS IP Address Released After the System Time Is Changed? - Virtual Private Cloud

            Why Is the ECS IP Address Released After the System Time Is Changed? Possible Causes If the new ECS system time is later than the DHCP lease expiration time, the system will attempt to renew the DHCP lease. If the renewal fails, the IP address will be released.

            Help > Virtual Private Cloud > FAQs > VPCs and Subnets
          • Manually Configuring IPv4 and IPv6 Policy-based Routes for a Windows ECS with Multiple Network Interfaces - Virtual Private Cloud

            Manually Configuring IPv4 and IPv6 Policy-based Routes for a Windows ECS with Multiple Network Interfaces - Virtual Private Cloud

            For details, see How Do I Log In to My ECS?

            Help > Virtual Private Cloud > User Guide > Elastic Network Interface and Supplementary Network Interface > Network Interface Configuration Examples > Configuring Policy-based Routes for an ECS with Multiple Network Interfaces
          • Example 3: Assigning a Virtual IP Address to an ECS for HA - Virtual Private Cloud

            Example 3: Assigning a Virtual IP Address to an ECS for HA - Virtual Private Cloud

            Example 3: Assigning a Virtual IP Address to an ECS for HA Scenarios Virtual IP addresses are used for high availability as they make active/standby ECS switchover possible.

            Help > Virtual Private Cloud > API Reference > Application Examples
          • Common ECS Ports - Virtual Private Cloud

            Common ECS Ports - Virtual Private Cloud

            Common ECS Ports When adding a security group rule, you must specify a port or port range for communications. Traffic is then allowed or denied if traffic matches this rule. Suppose a client requests to remotely log in to an ECS using SSH.

            Help > Virtual Private Cloud > User Guide > Access Control > Security Group
          • Why Can't My ECS Use Cloud-init? - Virtual Private Cloud

            Why Can't My ECS Use Cloud-init? - Virtual Private Cloud

            For details, see Cannot Log in to the ECS or Create a Non-root User After Cloud-init Is Configured. Fail to use an obtained private key to log in to an ECS after the ECS starts (Fail to obtain the ECS login password). Restart the ECS and try again.

            Help > Virtual Private Cloud > FAQs > Connectivity
          • Why Does My ECS Fail to Communicate with Other After It Has Firewall Installed? - Virtual Private Cloud

            Why Does My ECS Fail to Communicate with Other After It Has Firewall Installed? - Virtual Private Cloud

            Services are deployed on ECS 1 and ECS 2, and a third-party firewall is installed on ECS X. Traffic from ECS 1 and ECS 2 needs to be filtered by the firewall of ECS X. Fault Locating The issues here are described in order of how likely they are to occur.

            Help > Virtual Private Cloud > FAQs > Connectivity
          • What Are the Priorities of the Custom Route and EIP If Both Are Configured for an ECS to Enable the ECS to Access the Internet? - Virtual Private Cloud

            What Are the Priorities of the Custom Route and EIP If Both Are Configured for an ECS to Enable the ECS to Access the Internet? - Virtual Private Cloud

            What Are the Priorities of the Custom Route and EIP If Both Are Configured for an ECS to Enable the ECS to Access the Internet? The priority of an EIP is higher than that of a custom route in a VPC route table.

            Help > Virtual Private Cloud > FAQs > Connectivity
          • Why Are There Intermittent Interruptions When a Local Host Accesses a Website Built on an ECS? - Virtual Private Cloud

            Why Are There Intermittent Interruptions When a Local Host Accesses a Website Built on an ECS? - Virtual Private Cloud

            If the local host communicates with the ECS using NAT, this problem may occur. Run the following command to check whether tcp_tw_recycle is enabled on the ECS: sysctl -a|grep tcp_tw_recycle If the value of tcp_tw_recycle is 1, the function is enabled.

            Help > Virtual Private Cloud > FAQs > Connectivity
          • Can I Bind an EIP of an ECS to Another ECS? - Virtual Private Cloud

            Can I Bind an EIP of an ECS to Another ECS? - Virtual Private Cloud

            Can I Bind an EIP of an ECS to Another ECS? Yes. You can unbind the EIP from the original ECS. For details, see Binding or Unbinding an EIP. If you want to change an EIP for your ECS, refer to Changing an EIP. Parent topic: EIPs

            Help > Virtual Private Cloud > FAQs > EIPs
          • Why Does My ECS Fail to Obtain an IP Address? - Virtual Private Cloud

            Why Does My ECS Fail to Obtain an IP Address? - Virtual Private Cloud

            Provide customer service with the ECS ID, the ID of the subnet used by the ECS, and the ID of the VPC used by the ECS. Parent topic: Connectivity

            Help > Virtual Private Cloud > FAQs > Connectivity
          • Why Can't My ECS Access the Internet Even After an EIP Is Bound? - Virtual Private Cloud

            Why Can't My ECS Access the Internet Even After an EIP Is Bound? - Virtual Private Cloud

            Interface of the ECS Step 5: Check Whether Required Security Group Rules Have Been Configured Step 6: Check Whether Traffic from the ECS Subnet Is Blocked Step 1: Check Whether the ECS Is Running Properly Check the ECS status.

            Help > Virtual Private Cloud > FAQs > Connectivity
          • Why Is My ECS Unable to Communicate at a Layer 2 or Layer 3 Network? - Virtual Private Cloud

            Why Is My ECS Unable to Communicate at a Layer 2 or Layer 3 Network? - Virtual Private Cloud

            Why Is My ECS Unable to Communicate at a Layer 2 or Layer 3 Network? Symptom An ECS cannot ping the gateway of the subnet where the ECS resides. Troubleshooting Locate the fault based on the following procedure.

            Help > Virtual Private Cloud > FAQs > Connectivity
          • How Do I Change the DNS Server Addresses of an ECS? - Virtual Private Cloud

            How Do I Change the DNS Server Addresses of an ECS? - Virtual Private Cloud

            For details, see How Do I Log In to My ECS? You are advised to log in to the ECS using VNC.

            Help > Virtual Private Cloud > FAQs > VPCs and Subnets
          • Can I Change the Security Group of an ECS? - Virtual Private Cloud

            Can I Change the Security Group of an ECS? - Virtual Private Cloud

            Can I Change the Security Group of an ECS? Yes. An ECS must be associated with a security group. You can change the security group of an ECS at any time. On the ECS console, locate the target ECS to change the security group on the ECS details page.

            Help > Virtual Private Cloud > FAQs > Security
          • How Do I Access an ECS with an EIP Bound from the Internet? - Virtual Private Cloud

            How Do I Access an ECS with an EIP Bound from the Internet? - Virtual Private Cloud

            How Do I Access an ECS with an EIP Bound from the Internet? Each ECS is automatically added to a security group after being created to ensure its security.

            Help > Virtual Private Cloud > FAQs > EIPs
          • Can I Change the VPC of an ECS? - Virtual Private Cloud

            Can I Change the VPC of an ECS? - Virtual Private Cloud

            Can I Change the VPC of an ECS? Yes. You can click Change VPC in the Operation column on the Elastic Cloud Server page. For details, see Changing a VPC. Parent topic: VPCs and Subnets

            Help > Virtual Private Cloud > FAQs > VPCs and Subnets
          • Changing the Security Group of an ECS - Virtual Private Cloud

            Changing the Security Group of an ECS - Virtual Private Cloud

            You can also associate an ECS with a custom security group. If the custom security group cannot meet your requirements, you can change the custom security group. Changing the Security Group of an Individual ECS Go to the ECS list page.

            Help > Virtual Private Cloud > User Guide > Access Control > Security Group > Managing Instances Added to a Security Group
          • Collecting ECS Network Information - Virtual Private Cloud

            Collecting ECS Network Information - Virtual Private Cloud

            Obtaining ECS Network Interface Addresses Go to the ECS list page. In the ECS list, click the target ECS name. The Summary tab page of the ECS is displayed. In the NICs area, view the IP addresses of the primary and extended network interfaces.

            Help > Virtual Private Cloud > User Guide > Elastic Network Interface and Supplementary Network Interface > Network Interface Configuration Examples > Configuring Policy-based Routes for an ECS with Multiple Network Interfaces
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