By default, the WR21 and other SarOS routers listen for:
HTTP on port 80 and 8080
HTTPS on port 443 and 8443
SSH on port 22 and 8022
Telnet on port 23 and 8023
You can turn these services on and off under
Configuration - Network > Network Services
You can change the HTTPS port under
Configuration - Network > Advanced Network Settings
You can change the SSH port under
Configuration - Network > SSH Server > SSH Server 0
I do not believe you can change the HTTP and Telnet port. However, if you are simply using this for external access use the firewall and translate whatever port you want to the default port.
Nicholas Wilson
Your IoT
https://www.YourIoT.com.au