Checked your configuration?
What type of Internet connection?
Do you have a router with in-built firewall?
Network topology, description?
Other important (and required) information. You're not giving much information, other than Netgear.
Try to access your Netgear device (e.g. router) via the Web-based interface. Also check your user manual on instructions on how to access your device over a LAN (logging onto the device, through such an Interface).
You'll need to provide more information, or visit Netgear's website for more troubleshooting.