Last year (Mie), we encounted some trouble with W-LAN. Most of serious trouble is "encrypted type" .
Most of deivces will connect with WPA2. And devices can't connect with WPA....
So, need to check encrypted setting.
> internal LAN IP is assigned by you (DHCP), e.g., 192.168.1.xxx.
192.168.x.x is Class C IP address, if assign with DHCP, numbers of assign IP is 250. So, need to monitor status of assign. At worst, will deplation trouble...