Some wireless routers allow the the SSID to be hidden from normal wireless scans. This mode is often called "Disable SSID broadcast", "Invisible mode", etc. and is usually implemented by including a null SSID in the 802.11 beacon.
This mode is not currently supported by CDRouter. In order for CDRouter to connect using a wireless interface, the SSID must be included in all 802.11 beacons.
When CDRouter starts a wireless interface, it initiates a scan to try and find the configured SSID. If CDRouter is unable to find the configured SSID, it will display a list of all access points that have been detected during the scan.