You might have “broken” your Cyberoam, try 172.16.16.16 (Cyberoam's default IP address)
The ACU (Antenna Controller Unit) has lost connection with the VSAT modem. The ACU will expect a 'keep alive' from the VSAT Modem. If not received within 30 sec the event will show. Check:ACU LAN1 IP, in Network setup TCPIP port number. Check the LAN cable and the VSAT modem cables.