Simple Port Forwarding - Simple Port Forwarding works with WebPages and not directly with your router.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
socat - socat is a relay for bidirectional data transfer between two independent data channels.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
PortMapper - Do you need to map a specific TCP or UDP port on your machine to another port on another machine?
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.