Instance Port Verification

Last updated: 2020-09-08 14:44:43

    The instance port verification feature can help you detect the accessibility of security group ports of CVM instances, locate faults, and enhance the user experience.
    The following ports can be verified:

    Rule type Port Note
    Inbound rules TCP:3389 Used to permit Windows remote login.
    TCP:22 Used to permit Linux SSH login.
    TCP:443 Used to provide website HTTPS service.
    TCP:80 Used to provide website HTTP service.
    TCP:21 Used to permit uploads and downloads over FTP.
    TCP:20
    ICMP protocol Used to provide website HTTP service.
    Outbound rules ALL Used to permit all outbound traffic for access to external networks.

    Operation Guide

    1. Log in to the VPC console.
    2. Click Diagnostic Tools -> Instance Port Verification in the directory on the left to enter the management page.
    3. Select Region at the top of the page and, in the displayed list, find the instance to be verified and click Quick Check in the same row.
    4. You can see the port verification details in the pop-up window. To open ports that are not open to the Internet, click Open All Ports.

      Note:

      Open All Ports will open all listed ports. If you only need to open certain ports (such as TCP:22), add an inbound rule on the Security Group Console to open port TCP:22. For more information, see Adding Security Group Rules.

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