Recently, I have switched my router from DD-WRT to OpenWrt. OpenWrt is considered more functional and can be tailor-made. The first thing is always port forwarding, but this time it is easy and clear.
- Login to LuCI of OpenWrt via web browser
- Go to Network >> Firewall >> Port Forwards
- In the New port forward section
- give new rule a name
- choose protocol and port to forward
- select destination host
- Do NOT forget to click , then Save & Apply