Open Ports on C6300

When I scan my NAT, I see:

• 192.168.x.1
• Host is up (0.047s latency).
• Not shown: 96 closed ports
• PORT     STATE SERVICE
  53/tcp   open  domain
  80/tcp   open  http
  445/tcp  open  microsoft-ds
  5000/tcp open  upnp
  MAC Address: 6C:B0:CE:8C:14:2A (Netgear)

AND

• 192.168.x.254
• Host is up (0.0034s latency).
• Not shown: 98 closed ports
  PORT      STATE SERVICE
  514/tcp   open  shell
  49152/tcp open  unknown
  MAC Address: 28:C6:8E:00:00:01 (Netgear)

I disabled readyshare and upnp. What are these open ports all about? How the heck do I close them?

Thanks