Telnet/SSH and the command line - DD-WRT Wiki
wiki.dd-wrt.com › wiki › indexData sent to <local_port> is transferred over the secure SSH connection to the <ssh_server>, where it is then decrypted and forwarded to <destination_port> on <destination_server>. For instance, if your router's WAN IP address is 12.23.34.35, its remote administration SSH port is 9999 and its LAN-accessible web interface is at port 80: