SSH
Config file
Example
Host server hostname 1.2.3.4 user username port 2222 LocalForward 8443 localhost:443
Restricted shell
AllowTcpForwarding has to be enabled for the use of PermitOpen.
Match User testuser AllowTcpForwarding yes X11Forwarding no PermitTunnel no GatewayPorts no AllowAgentForwarding no PermitOpen localhost:80 ForceCommand read -p "Press enter to exit"