What is the command to change the Telnet port from 23 to another port number of my choosing for a 3745 and 1760 router. I would also like to do this with a 3550 and a 4503 Catalyst switch. Our ISP blocks all the common ports and I want to configure our Linksys Router for port forwarding to some Cisco equipment we have. I know how to do the port forwarding on the Linksys. I need the command(s) to change the Telnet port on the Cisco routers & switches.