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Last Updated: Oct 30, 2019


Firewall allows users to open and close ports on the server. The server opens ports 22 (for SSH service), 80 (for HTTP service), and 443 (for HTTPS encrypted access service) by default. The rest ports are closed by default.

Add firewall rules

  1. Log on to the Simple Application Server console, and select Security > Firewall > Add Rules.

  2. Select the corresponding application type, protocol, and port number, and then click OK.
    If you want to add more rules, you can click Add rules.


The firewall has pre-installed the mapping relations between the following applications and port numbers.

Application Protocol Port Number Description
HTTP TCP 80 Default port for HTTP protocol
HTTPS TCP 443 Default port for HTTPS encryption protocol
SSH TCP 22 Default port for SSH protocol
FTP TCP 21 Default port for FTP protocol
Telnet TCP 23 Default port for Telnet
MySQL TCP 3306 Default port for MySQL database
Custom TCP/UDP 1-65535 Ports customized by the user