The instance port verification feature can help you detect the port accessibility of a security group associated with CVM instances, locate faults, and improve the user experience.
You can verify the following ports:
Rule | Port | Description |
---|---|---|
Inbound rules | TCP:3389 | Used to allow Windows remote login. |
TCP:22 | Used to allow Linux SSH login. | |
TCP:443 | Used to provide website HTTPS service. | |
TCP:80 | Used to provide website HTTP service. | |
TCP:21 | Used to allow uploads and downloads over FTP. | |
TCP:20 | ||
ICMP protocol | Used to provide website HTTP service. ICMP is a control protocol, and no ports are involved. | |
Outbound rules | ALL | Used to allow all outbound traffic for access to external networks. |
TCP:22
, you can add an inbound rule for the selected ID/Name in Security Group console to open port TCP:22. You can also select all for Source to open all IPs, or enter a specific IP (IP range), as shown below:
Was this page helpful?