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Forum Discussion
Xr500 Dropping Connection Every day
XR500 V2.3.2.134
For some reason my xr500 has become unreliable in the sense it is dropping connection every day. It has never done this and has just started. I have been on the most current firmware version for a year now. Nothing has changed. The internet will disconnect then reconnect in under 2 minutes. I have factory reset and the connection drops are still occurring. At this point I truly need to highlight the error as I work from home quite a bit. In the router logs a ton of the following is occurring:
[DoS Attack: SYN/ACK Scan] from source: 178.63.206.246, port 443, Tuesday, October 10, 2023 00:22:40
[DumaOS] DHCP new event., Tuesday, October 10, 2023 00:20:38
[DHCP IP: 192.168.1.3] to MAC address a8:23:fe:6c:a1:0c, Tuesday, October 10, 2023 00:20:38
[DoS Attack: SYN/ACK Scan] from source: 178.63.206.246, port 443, Tuesday, October 10, 2023 00:18:36
[DumaOS] applying qos for zone lan, Tuesday, October 10, 2023 00:17:27
[DumaOS] applying qos for zone wan, Tuesday, October 10, 2023 00:17:27
[DumaOS] config write 'com.netdumasoftware.qos.settings', Tuesday, October 10, 2023 00:17:26
[DoS Attack: SYN/ACK Scan] from source: 178.63.206.246, port 443, Tuesday, October 10, 2023 00:12:54
[admin login] from source 192.168.1.5, Tuesday, October 10, 2023 00:11:25
[DumaOS] DHCP new lease allocated., Tuesday, October 10, 2023 00:06:20
[DumaOS] DHCP new event., Tuesday, October 10, 2023 00:06:20
[DHCP IP: 192.168.1.5] to MAC address c8:7f:54:56:05:14, Tuesday, October 10, 2023 00:06:20
[DoS Attack: SYN/ACK Scan] from source: 46.63.116.120, port 443, Monday, October 09, 2023 23:21:41
[DoS Attack: TCP/UDP Chargen] from source: 89.248.163.131, port 45148, Monday, October 09, 2023 22:47:53
[DoS Attack: RST Scan] from source: 44.206.2.109, port 8443, Monday, October 09, 2023 22:41:51
[DoS Attack: RST Scan] from source: 44.206.2.109, port 8443, Monday, October 09, 2023 22:25:11
[DoS Attack: WinNuke Attack] from source: 219.122.229.46, port 58020, Monday, October 09, 2023 22:17:52
[DoS Attack: SYN/ACK Scan] from source: 154.31.18.26, port 80, Monday, October 09, 2023 21:30:25
[DumaOS] The selected theme does not exist: 'default', Monday, October 09, 2023 21:22:37
[DumaOS] Theme path does match manifest 'default', Monday, October 09, 2023 21:22:37
[DumaOS] Cloudsync Themes result 'false','All mirrors are down', Monday, October 09, 2023 21:22:37
[DoS Attack: SYN/ACK Scan] from source: 198.12.210.211, port 443, Monday, October 09, 2023 21:06:04
[DoS Attack: SYN/ACK Scan] from source: 51.79.239.33, port 19085, Monday, October 09, 2023 19:54:55
[DoS Attack: SYN/ACK Scan] from source: 51.79.239.33, port 19085, Monday, October 09, 2023 19:50:12
[DumaOS] config write 'com.netdumasoftware.devicemanager.database', Monday, October 09, 2023 19:48:22
[DumaOS] DHCP lease change., Monday, October 09, 2023 19:48:21
[DumaOS] DHCP new event., Monday, October 09, 2023 19:48:21
[DHCP IP: 192.168.1.2] to MAC address ea:0f:80:e6:d1:b4, Monday, October 09, 2023 19:48:21
[DoS Attack: SYN/ACK Scan] from source: 185.73.243.144, port 25565, Monday, October 09, 2023 19:17:20
[DumaOS] DHCP lease change., Monday, October 09, 2023 18:53:58
[DumaOS] DHCP new event., Monday, October 09, 2023 18:53:58
[DHCP IP: 192.168.1.6] to MAC address 38:64:07:3b:df:ab, Monday, October 09, 2023 18:53:58
[DoS Attack: RST Scan] from source: 147.182.238.12, port 22, Monday, October 09, 2023 18:36:04
[DoS Attack: RST Scan] from source: 52.223.202.162, port 80, Monday, October 09, 2023 18:28:04
[DoS Attack: RST Scan] from source: 52.223.202.162, port 80, Monday, October 09, 2023 18:28:04
[DoS Attack: RST Scan] from source: 52.223.202.162, port 80, Monday, October 09, 2023 18:28:04
[DoS Attack: RST Scan] from source: 52.223.202.162, port 80, Monday, October 09, 2023 18:28:04
[DumaOS] DHCP lease change., Monday, October 09, 2023 18:14:34
[DumaOS] DHCP new event., Monday, October 09, 2023 18:14:34
[DHCP IP: 192.168.1.6] to MAC address 38:64:07:3b:df:ab, Monday, October 09, 2023 18:14:34
[DoS Attack: ACK Scan] from source: 178.128.82.89, port 8768, Monday, October 09, 2023 17:42:15
[DoS Attack: TCP/UDP Echo] from source: 68.105.29.11, port 53, Monday, October 09, 2023 17:37:10
[DoS Attack: TCP/UDP Echo] from source: 68.105.28.12, port 53, Monday, October 09, 2023 17:37:10
[DoS Attack: TCP/UDP Echo] from source: 68.105.28.11, port 53, Monday, October 09, 2023 17:37:10
[DoS Attack: TCP/UDP Echo] from source: 68.105.29.11, port 53, Monday, October 09, 2023 17:37:07
[DoS Attack: TCP/UDP Echo] from source: 68.105.28.11, port 53, Monday, October 09, 2023 17:37:07
[DoS Attack: TCP/UDP Echo] from source: 68.105.28.12, port 53, Monday, October 09, 2023 17:37:07
[DoS Attack: TCP/UDP Echo] from source: 68.105.28.11, port 53, Monday, October 09, 2023 17:37:05
[DoS Attack: SYN/ACK Scan] from source: 199.231.233.147, port 30120, Monday, October 09, 2023 17:23:06
[DoS Attack: SYN/ACK Scan] from source: 199.231.233.147, port 30120, Monday, October 09, 2023 17:23:02
[DoS Attack: SYN/ACK Scan] from source: 199.231.233.147, port 30120, Monday, October 09, 2023 17:23:00
[DoS Attack: SYN/ACK Scan] from source: 199.231.233.147, port 30120, Monday, October 09, 2023 17:22:59
[DumaOS] Cloudsync DPI result 'nil','failed to sync', Monday, October 09, 2023 17:22:42
[DumaOS] Cloudsync DPI 'skipping mirror', Monday, October 09, 2023 17:22:42
[DumaOS] Cloudsync DPI 'HTTP sync failed', Monday, October 09, 2023 17:22:42
[DumaOS] HTTP download failed with code '404', Monday, October 09, 2023 17:22:42
[DumaOS] The selected theme does not exist: 'default', Monday, October 09, 2023 17:22:37
[DumaOS] Theme path does match manifest 'default', Monday, October 09, 2023 17:22:37
[DumaOS] Cloudsync Themes result 'false','All mirrors are down', Monday, October 09, 2023 17:22:37
[DoS Attack: ACK Scan] from source: 46.101.28.153, port 31988, Monday, October 09, 2023 17:16:30
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:42:46
[DumaOS] DHCP new event., Monday, October 09, 2023 16:42:46
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:42:46
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:42:39
[DumaOS] DHCP new event., Monday, October 09, 2023 16:42:39
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:42:39
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:42:31
[DumaOS] DHCP new event., Monday, October 09, 2023 16:42:31
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:42:31
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:42:28
[DumaOS] DHCP new event., Monday, October 09, 2023 16:42:28
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:42:28
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:42:02
[DumaOS] DHCP new event., Monday, October 09, 2023 16:42:02
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:42:02
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:41:49
[DumaOS] DHCP new event., Monday, October 09, 2023 16:41:49
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:41:49
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:41:23
[DumaOS] DHCP new event., Monday, October 09, 2023 16:41:23
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:41:23
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:40:58
[DumaOS] DHCP new event., Monday, October 09, 2023 16:40:58
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:40:58
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:40:46
[DumaOS] DHCP new event., Monday, October 09, 2023 16:40:46
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:40:46
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:40:35
[DumaOS] DHCP new event., Monday, October 09, 2023 16:40:35
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:40:35
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:40:23
[DumaOS] DHCP new event., Monday, October 09, 2023 16:40:23
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:40:23
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:39:56
[DumaOS] DHCP new event., Monday, October 09, 2023 16:39:56
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:39:56
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:39:30
[DumaOS] DHCP new event., Monday, October 09, 2023 16:39:30
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:39:30
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:39:18
[DumaOS] DHCP new event., Monday, October 09, 2023 16:39:18
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:39:18
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:38:53
[DumaOS] DHCP new event., Monday, October 09, 2023 16:38:53
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:38:53
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:38:26
[DumaOS] DHCP new event., Monday, October 09, 2023 16:38:26
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:38:26
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:38:23
[DumaOS] DHCP new event., Monday, October 09, 2023 16:38:23
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:38:23
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:38:18
[DumaOS] DHCP new event., Monday, October 09, 2023 16:38:18
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:38:18
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:38:13
[DumaOS] DHCP new event., Monday, October 09, 2023 16:38:13
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:38:13
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:38:08
[DumaOS] DHCP new event., Monday, October 09, 2023 16:38:08
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:38:08
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:38:00
[DumaOS] DHCP new event., Monday, October 09, 2023 16:38:00
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:38:00
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:37:57
[DumaOS] DHCP new event., Monday, October 09, 2023 16:37:57
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:37:57
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:37:51
[DumaOS] DHCP new event., Monday, October 09, 2023 16:37:51
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:37:51
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:37:46
[DumaOS] DHCP new event., Monday, October 09, 2023 16:37:46
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:37:46
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:37:33
[DumaOS] DHCP new event., Monday, October 09, 2023 16:37:33
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:37:33
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:37:21
[DumaOS] DHCP new event., Monday, October 09, 2023 16:37:21
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:37:21
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:36:55
[DumaOS] DHCP new event., Monday, October 09, 2023 16:36:55
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:36:55
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:36:42
[DumaOS] DHCP new event., Monday, October 09, 2023 16:36:42
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:36:42
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:36:16
[DumaOS] DHCP new event., Monday, October 09, 2023 16:36:16
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:36:16
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:35:43
[DumaOS] DHCP new event., Monday, October 09, 2023 16:35:43
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:35:43
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:35:39
[DumaOS] DHCP new event., Monday, October 09, 2023 16:35:39
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:35:39
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:35:34
[DumaOS] DHCP new event., Monday, October 09, 2023 16:35:34
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:35:34
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:35:25
[DumaOS] DHCP new event., Monday, October 09, 2023 16:35:25
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:35:25
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:35:21
[DumaOS] DHCP new event., Monday, October 09, 2023 16:35:21
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:35:21
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:35:17
[DumaOS] DHCP new event., Monday, October 09, 2023 16:35:17
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:35:17
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:35:12
[DumaOS] DHCP new event., Monday, October 09, 2023 16:35:12
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:35:12
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:35:04
[DumaOS] DHCP new event., Monday, October 09, 2023 16:35:04
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:35:04
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:35:00
[DumaOS] DHCP new event., Monday, October 09, 2023 16:35:00
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:35:00
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:55
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:55
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:55
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:54
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:54
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:54
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:48
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:48
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:48
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:39
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:39
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:39
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:35
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:35
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:35
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:34
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:34
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:34
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:32
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:32
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:31
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:22
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:22
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:22
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:17
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:17
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:17
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:34:12
[DumaOS] DHCP new event., Monday, October 09, 2023 16:34:12
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:34:12
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:33:45
[DumaOS] DHCP new event., Monday, October 09, 2023 16:33:45
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:33:45
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:33:33
[DumaOS] DHCP new event., Monday, October 09, 2023 16:33:33
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:33:33
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:33:11
[DumaOS] DHCP new event., Monday, October 09, 2023 16:33:11
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:33:11
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:33:08
[DumaOS] DHCP new event., Monday, October 09, 2023 16:33:08
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:33:08
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:32:41
[DumaOS] DHCP new event., Monday, October 09, 2023 16:32:41
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:32:41
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:32:28
[DumaOS] DHCP new event., Monday, October 09, 2023 16:32:28
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:32:28
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:32:14
[DumaOS] DHCP new event., Monday, October 09, 2023 16:32:14
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:32:14
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:32:01
[DumaOS] DHCP new event., Monday, October 09, 2023 16:32:01
[DHCP IP: 192.168.1.8] to MAC address 2c:33:58:81:5d:a8, Monday, October 09, 2023 16:32:01
[DumaOS] DHCP lease change., Monday, October 09, 2023 16:31:34
2 Replies
What Firmware version is currently loaded?
What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?
Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.That many changes in DHCP Lease for one device is a problem. What is this device at 192.168.1.8?
I'd do a whois look up on those other WAN side IP addresses to see where they are coming from.
Has a factory reset and setup from scratch been performed since last FW update? A complete pull of the power adapters for a period of time after the factory reset then walk thru the setup wizard and setup from scratch with a wired PC and web browser. https://kb.netgear.com/22697/How-do-I-install-my-NETGEAR-router-using-the-router-web-interface
Recommend setting the default DHCP IP address pool range to the following after applying and a factory reset: 192.168.#.100 to 192.168.#.200.
https://kb.netgear.com/24089/How-do-I-specify-the-pool-of-IP-addresses-assigned-by-my-Nighthawk-router
https://kb.netgear.com/25722/How-do-I-reserve-an-IP-address-on-my-NETGEAR-router
I would power OFF the ISP modem for 1 minute. Factory reset the router and power it off. Power ON the ISP modem and let it sync. Then power ON the router and walk thru the setup wizard again using a wired PC and a web browser.
Press the back reset button for 15 seconds then release.
https://kb.netgear.com/9665/How-do-I-perform-a-factory-reset-on-my-NETGEAR-router- In LAN Settings, set the DHCP range to start at .50, then assign reserved IP addresses to devices between .2 & .49 so they're out of the DHCP range, apply, reboot from the interface, wait 2 minutes and see if that stops the disconnects.
