Agree totally with Conan - have same SOP.
Router is also set to drop connection after 15mins.... in practise this is never a problem as wake up is minimal.
Suggest you use a firewall router with Stateful Packet Inspection. Mine is backed up with a software firewalll on each machine as well.
May seem paranoid, but it is better than being hacked!!!
Also, WPA security recommended for wireless comms.
Regards,
Shuttlebus