My Firewall software is reporting multiple MITM attacks per day and My Network Monitor shows several IP addresses connecting to my network. Is this normal? Should I be worried?

Here's the firewall log: MiTM Attack detected and blocked at: 2016-09-12 11:45:47 Port Scan detected and blocked at: 2016-09-13 12:37:11 from IP address: 76.231.78.115 MiTM Attack detected and blocked at: 2016-09-14 12:40:12 MiTM Attack detected and blocked at: 2016-09-14 12:40:14 MiTM Attack detected and blocked at: 2016-09-14 12:40:20 MiTM Attack detected and blocked at: 2016-09-14 12:40:47 Port Scan detected and blocked at: 2016-09-14 01:16:59 from IP address: 241.156.137.83 Syn Flood detected and blocked at: 2016-09-14 01:38:45 from IP address: 75.105.240.146 MiTM Attack detected and blocked at: 2016-09-14 03:51:49 MiTM Attack detected and blocked at: 2016-09-14 05:40:34 MiTM Attack detected and blocked at: 2016-09-14 05:40:35 MiTM Attack detected and blocked at: 2016-09-14 05:40:42 MiTM Attack detected and blocked at: 2016-09-14 05:40:44 MiTM Attack detected and blocked at: 2016-09-14 07:29:30 MiTM Attack detected and blocked at: 2016-09-14 07:29:33 MiTM Attack detected and blocked at: 2016-09-14 08:45:43 MiTM Attack detected and blocked at: 2016-09-14 08:45:43 MiTM Attack detected and blocked at: 2016-09-14 08:45:52 MiTM Attack detected and blocked at: 2016-09-14 09:10:07 MiTM Attack detected and blocked at: 2016-09-14 11:22:46 MiTM Attack detected and blocked at: 2016-09-14 11:23:10 MiTM Attack detected and blocked at: 2016-09-15 01:11:33 MiTM Attack detected and blocked at: 2016-09-15 01:11:36 MiTM Attack detected and blocked at: 2016-09-15 03:00:27 MiTM Attack detected and blocked at: 2016-09-15 03:00:39 MiTM Attack detected and blocked at: 2016-09-15 04:49:20 MiTM Attack detected and blocked at: 2016-09-15 04:49:29 MiTM Attack detected and blocked at: 2016-09-15 06:38:14 MiTM Attack detected and blocked at: 2016-09-15 06:38:38 MiTM Attack detected and blocked at: 2016-09-15 07:39:24 MiTM Attack detected and blocked at: 2016-09-15 09:28:07 MiTM Attack detected and blocked at: 2016-09-15 09:28:09 MiTM Attack detected and blocked at: 2016-09-15 09:28:18 MiTM Attack detected and blocked at: 2016-09-15 11:17:01 MiTM Attack detected and blocked at: 2016-09-15 11:17:01 MiTM Attack detected and blocked at: 2016-09-15 11:17:10 MiTM Attack detected and blocked at: 2016-09-15 11:17:28 MiTM Attack detected and blocked at: 2016-09-15 12:15:26 MiTM Attack detected and blocked at: 2016-09-15 12:15:53 Syn Flood detected and blocked at: 2016-09-15 12:19:23 from IP address: 92.173.220.146 Port Scan detected and blocked at: 2016-09-15 12:23:33 from IP address: 132.120.173.176 MiTM Attack detected and blocked at: 2016-09-15 01:35:35 MiTM Attack detected and blocked at: 2016-09-15 01:35:50

Network Monitor: Connected IP Address: 192.168.1.69 at: 2016-09-12 11:46:06 Connected IP Address: 192.168.1.254 at: 2016-09-12 11:46:06 Connected IP Address: 192.168.1.255 at: 2016-09-12 11:46:06 Connected IP Address: 192.168.1.247 at: 2016-09-12 11:57:16 Disconnected IP Address: 192.168.1.255 at: 2016-09-13 12:00:16 Connected IP Address: 192.168.1.255 at: 2016-09-13 12:01:46 Connected IP Address: 192.168.1.237 at: 2016-09-13 12:10:46 Disconnected IP Address: 192.168.1.255 at: 2016-09-13 12:15:16 Connected IP Address: 192.168.1.255 at: 2016-09-13 12:16:46 Disconnected IP Address: 192.168.1.237 at: 2016-09-13 12:30:16 Disconnected IP Address: 192.168.1.247 at: 2016-09-13 12:30:16 Disconnected IP Address: 192.168.1.255 at: 2016-09-13 12:30:16 Connected IP Address: 192.168.1.255 at: 2016-09-13 12:31:46 Disconnected IP Address: 192.168.1.255 at: 2016-09-13 12:45:16 Connected IP Address: 192.168.1.255 at: 2016-09-13 12:46:46 Disconnected IP Address: 192.168.1.69 at: 2016-09-14 12:40:12 Disconnected IP Address: 192.168.1.254 at: 2016-09-14 12:40:12 Disconnected IP Address: 192.168.1.255 at: 2016-09-14 12:40:12 Connected IP Address: 192.168.1.254 at: 2016-09-14 12:41:12 Connected IP Address: 192.168.1.255 at: 2016-09-14 12:41:12 Connected IP Address: 192.168.1.244 at: 2016-09-14 12:42:26 Disconnected IP Address: 192.168.1.255 at: 2016-09-14 12:45:26 Connected IP Address: 192.168.1.255 at: 2016-09-14 01:03:26 Disconnected IP Address: 192.168.1.244 at: 2016-09-14 01:06:26 Disconnected IP Address: 192.168.1.255 at: 2016-09-14 01:06:26 Connected IP Address: 192.168.1.237 at: 2016-09-14 01:07:56 Connected IP Address: 192.168.1.255 at: 2016-09-14 01:12:26 Disconnected IP Address: 192.168.1.255 at: 2016-09-14 01:15:26 Connected IP Address: 192.168.1.69 at: 2016-09-14 01:42:26 Disconnected IP Address: 192.168.1.237 at: 2016-09-14 01:45:26 Disconnected IP Address: 192.168.1.69 at: 2016-09-14 05:40:34 Disconnected IP Address: 192.168.1.254 at: 2016-09-14 05:40:34 Connected IP Address: 192.168.1.254 at: 2016-09-14 05:40:42 Connected IP Address: 192.168.1.255 at: 2016-09-14 05:40:42 Disconnected IP Address: 192.168.1.255 at: 2016-09-14 07:29:32 Disconnected IP Address: 192.168.1.254 at: 2016-09-14 08:45:46 Connected IP Address: 192.168.1.254 at: 2016-09-14 08:47:15 Connected IP Address: 192.168.1.255 at: 2016-09-14 09:09:45 Disconnected IP Address: 192.168.1.255 at: 2016-09-14 09:12:45 Connected IP Address: 192.168.1.255 at: 2016-09-14 09:32:15 Connected IP Address: 192.168.1.247 at: 2016-09-14 09:33:45 Connected IP Address: 192.168.1.65 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.67 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.68 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.69 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.70 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.71 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.73 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.75 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.87 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.237 at: 2016-09-15 01:11:27 Disconnected IP Address: 192.168.1.255 at: 2016-09-15 01:11:27 Connected IP Address: 192.168.1.255 at: 2016-09-15 03:00:21 Disconnected IP Address: 192.168.1.87 at: 2016-09-15 03:00:21 Disconnected IP Address: 192.168.1.237 at: 2016-09-15 03:00:21 Disconnected IP Address: 192.168.1.247 at: 2016-09-15 03:00:21 Connected IP Address: 192.168.1.87 at: 2016-09-15 04:49:15 Disconnected IP Address: 192.168.1.71 at: 2016-09-15 04:49:15 Disconnected IP Address: 192.168.1.73 at: 2016-09-15 04:49:15 Connected IP Address: 192.168.1.71 at: 2016-09-15 06:38:09 Connected IP Address: 192.168.1.73 at: 2016-09-15 06:38:09 Disconnected IP Address: 192.168.1.255 at: 2016-09-15 06:38:09 Connected IP Address: 192.168.1.255 at: 2016-09-15 07:39:11 Disconnected IP Address: 192.168.1.65 at: 2016-09-15 07:39:11 Disconnected IP Address: 192.168.1.67 at: 2016-09-15 07:39:11 Disconnected IP Address: 192.168.1.69 at: 2016-09-15 07:39:12 Disconnected IP Address: 192.168.1.70 at: 2016-09-15 07:39:12 Disconnected IP Address: 192.168.1.73 at: 2016-09-15 07:39:12 Disconnected IP Address: 192.168.1.87 at: 2016-09-15 07:39:12 Disconnected IP Address: 192.168.1.68 at: 2016-09-15 09:28:07 Disconnected IP Address: 192.168.1.71 at: 2016-09-15 09:28:07 Disconnected IP Address: 192.168.1.75 at: 2016-09-15 09:28:07 Disconnected IP Address: 192.168.1.254 at: 2016-09-15 11:17:01 Disconnected IP Address: 192.168.1.255 at: 2016-09-15 11:17:01 Connected IP Address: 192.168.1.254 at: 2016-09-15 12:15:20 Connected IP Address: 192.168.1.255 at: 2016-09-15 12:15:20 Connected IP Address: 192.168.1.70 at: 2016-09-15 12:16:20 Disconnected IP Address: 192.168.1.255 at: 2016-09-15 12:20:28 Connected IP Address: 192.168.1.255 at: 2016-09-15 12:35:28 Disconnected IP Address: 192.168.1.255 at: 2016-09-15 12:39:58 Connected IP Address: 192.168.1.255 at: 2016-09-15 12:45:58 Disconnected IP Address: 192.168.1.255 at: 2016-09-15 12:50:28 Connected IP Address: 192.168.1.255 at: 2016-09-15 12:54:58 Disconnected IP Address: 192.168.1.255 at: 2016-09-15 12:59:28 Disconnected IP Address: 192.168.1.70 at: 2016-09-15 01:35:14 Connected IP Address: 192.168.1.255 at: 2016-09-15 01:36:44 Disconnected IP Address: 192.168.1.255 at: 2016-09-15 01:38:14

/r/security Thread Parent