So i've had this issue since buying my new asus modem. I'm on NBN in australia using a dedicated modem, the asus is being used basically for wifi throughout the house. I am having internet disconnection every day once a day and it is happening on wifi and ethernet. THe issue sometimes fixes itself by turning the router on and off and other times i have to turn both the modem and router off. I originally had a time disparity which I rectified in settings. We have changed NTP address to 0.au.pool.ntp.org from whatever the default was and the issue happened again today. I have a copy of my log as it means nothing to me, running out of things to try at this point.
ay 4 17:45:45 kernel: eth0 (Int switch port: 0) (Logical Port: 0) (phyId: 8) Link DOWN.
May 4 17:45:48 kernel: eth0 (Int switch port: 0) (Logical Port: 0) (phyId: 8) Link Up at 1000 mbps full duplex
May 4 17:48:54 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:48:54 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:49:21 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:49:21 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:49:31 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:49:31 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:10 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:10 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:19 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:19 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:23 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:23 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:58:07 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:58:07 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:59:32 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:59:32 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:59:38 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:59:38 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:06 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:06 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:06 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:07 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:08 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:08 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:09 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:09 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:10 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:10 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:11 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:11 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:13 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:13 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:14 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:14 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:51:06 WATCHDOG: [FAUPGRADE][auto_firmware_check6148)]period_retry = 0
May 4 18:51:06 WATCHDOG: [FAUPGRADE][auto_firmware_check6154)]periodic_check AM 5:2
May 4 18:51:09 WATCHDOG: [FAUPGRADE][auto_firmware_check6177)]retrieve firmware information
May 4 18:51:09 rc_service: watchdog 1380:notify_rc stop_upgrade;start_webs_upgrade
May 4 18:51:09 usb: USB is ejected
May 4 18:51:09 nat: apply nat rules (/tmp/nat_rules_eth4_eth4)
May 4 18:51:10 A.QoS: set_qos_off, ret=65280
May 4 18:51:10 BWDPI: force to flush flowcache entries
May 4 18:51:12 miniupnpd[5999]: shutting down MiniUPnPd
ay 4 17:45:45 kernel: eth0 (Int switch port: 0) (Logical Port: 0) (phyId: 8) Link DOWN.
May 4 17:45:48 kernel: eth0 (Int switch port: 0) (Logical Port: 0) (phyId: 8) Link Up at 1000 mbps full duplex
May 4 17:48:54 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:48:54 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:49:21 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:49:21 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:49:31 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:49:31 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:10 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:10 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:19 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:19 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:23 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:56:23 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:58:07 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:58:07 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:59:32 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:59:32 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:59:38 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 17:59:38 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:06 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:06 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:06 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:07 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:08 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:08 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:09 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:09 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:10 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:10 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:11 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:11 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:13 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:13 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:14 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:05:14 miniupnpd[5999]: upnp_event_process_notify: connect(192.168.50.181:2869): Connection timed out
May 4 18:51:06 WATCHDOG: [FAUPGRADE][auto_firmware_check6148)]period_retry = 0
May 4 18:51:06 WATCHDOG: [FAUPGRADE][auto_firmware_check6154)]periodic_check AM 5:2
May 4 18:51:09 WATCHDOG: [FAUPGRADE][auto_firmware_check6177)]retrieve firmware information
May 4 18:51:09 rc_service: watchdog 1380:notify_rc stop_upgrade;start_webs_upgrade
May 4 18:51:09 usb: USB is ejected
May 4 18:51:09 nat: apply nat rules (/tmp/nat_rules_eth4_eth4)
May 4 18:51:10 A.QoS: set_qos_off, ret=65280
May 4 18:51:10 BWDPI: force to flush flowcache entries
May 4 18:51:12 miniupnpd[5999]: shutting down MiniUPnPd