1. Are you trying that on your LAN? If so, that's not always supported with all routers.
2. You can't use port 80. Read from https://www.google.com/search?q=Does+Verizon+block+port+80%3F&gl=US
For 4 days, I have been trying to get my IIS web server to work! I am able to access the website internally through the internal static ip address 192.###.#.201 from different devices on the network. I have setup port forwarding on my Verizon router to forward all incoming requests from the external public to the internal port 80 on the Windows 10 desktop where my IIS server is sitting. I have completely turned off all firewall settings and anti-virus applications/processes on my Windows 10. Even after having all these doors being opened, still every time I access the website through the url http://public-ip-address:port# I got the "This site can't be reached" message. I tried to open the url with both IE and Chrome browsers. But none of them work. From the public, I have no problem accessing other web servers which are connected to the same Verizon router that send and receive communication through port 80. So, clearly there is either something wrong with my Windows 10 or the setup of my IIS server. Or it could be that the router has trouble forwarding the port. I am just guessing. I don't know. It has been 4 days and countless hours, but I am still not able to find any clue to why this is happening. Could someone who has been through similar situation help me out?! Thank you for all of your help!