Make sure GatewayPorts is enabled on server side.

sudo sh -c 'echo "GatewayPorts clientspecified" >> /etc/ssh/sshd_config'
sudo systemctl reload sshd

Tip

Start a server in container:

docker run -it testcontainers/sshd:1.1.0 /usr/sbin/sshd -D -e -o PasswordAuthentication=yes -o PermitRootLogin=yes -o GatewayPorts=clientspecified

Default user: root
Default password: root