@airmaxin180 On the C9, you go to: Advanced --> NAT Forwarding --> Virtual Servers --> Add --> - Service Type: type something you'll remember it by - External port: the TCP and/or UDP port or port...

I love that you use nmap's OS detection so resourcefully (and intelligently!). I looked online to see if the c9's motherboard has flash reset pins, but it doesn't appear to. I'm not sure of what else...

That is frustrating. What I would do is install DD-WRT on it. Use the same method as before to load the firmware on it, but put the DD-WRT file in its place....

@TNV That nmap shows the ports closed, it seems like MAC filtering or IP filtering had previously been implemented. Either that, or access to the admin page has been disallowed on the WiFi interface,...

What about port 443? Just do a full scan in nmap: -p 1-65535

@TNV I would use a port scanner (nmap) to see whether a web server is running on the router, and on which port(s)