I am trying to utilize the wifi from my Mac book air and pass the connection to the router. I am connect but not internet connection on the router
Isn't that the wrong way around? How does your Mac connects to the internet?
My Mac is connect via wifi from my home router. I am trying to set up the portable router to use on an upcoming cruise. I will connect my laptop to the wifi and then pass the signal via ethernet cable to the router and and connect multiple devices to the portable router.
What you should do is connect the router to the home wifi or cruise wifi, then share the wifi to your other devices.
But if you have to share your macbook's network, you can check Share the Internet connection on Mac with other network users - Apple Support (HK)