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What Do I Do If My Server Can Be Accessed from the Internet But Cannot Access the Internet?

Symptom

The server can be accessed from, but cannot access the Internet.

Fault Locating

  1. Check on-premises network configurations, such as the firewall and IP address.
  2. Check the EIP connection.
  3. Check whether the security group of the server or the network ACL of the subnet to which the server belongs denies the outbound traffic.

Solution

  1. Check on-premises network configurations, such as the firewall and IP address.
  2. Check the EIP connection. For details, see How Do I Handle EIP Connection Failure?
  3. Check whether the security group of the server denies the outbound traffic.

    By default, the security group allows all outbound traffic. If the outbound traffic is denied, click Allow Common Ports.

  4. Check whether the network ACL of the subnet to which the server belongs denies the outbound traffic.
    By default, a network ACL denies all outbound traffic. You need to add an outbound rule with Action set to Allow to the network ACL associated with the server.
    Figure 1 Allowing outbound traffic
Parent topic: Connectivity