2020-02-04 09:00:49 [Error][Alarm-Log] AlarmID:303500,AlarmLevel:Error,DoS attack. Type: smurf. Source IP address: 192.168.1.102. Destination IP address: 192.168.1.255. Source MAC address:
These IP addresses are internal to your network. The 102 address is a machine on your network, the 255 address is the broadcast address of your internal network (the address that something scanning your network for vulnerable hosts would use)
What machine on your internal network has the IP address 192.168.1.102
Biffa, since the whole network has been reseted Im not sure which device it was on 102 but I have some screenshots from the network analyzer by technet app and it had the following letters beside it, green W, red B, purple 6 and a green P. 4 in total. To tell you the truth Im clueless to what is the meaning of them but even my modem only has 3 at this moment as well as my ipad from which I control everything on the network.
And I just use this paid App Network Analyzer to find the miners on my network which have only 2 green letters beside them which is a lightened green color W and a darker color P.