Hi Asus,
Sorry if this issue have been reported but can't find similar issue/router as mine
I'm currently using RT-AC67U with firmware 3.0.0.4.385_20632 Unifi 100mbps. I'm not able to hold to an internet IP for more than 2-4hours and router shows not connected to internet cause PAP authentication failed.
Below is the log for your reference when it happens;
Oct 2 07:11:53 WAN Connection: Fail to connect with some issues.
Oct 2 07:11:53 DualWAN: skip single wan wan_led_control - WANRED off
Oct 2 07:11:54 nat: apply redirect rules
Oct 2 07:11:58 WAN Connection: Ethernet link down.
Oct 2 07:12:03 WAN Connection: Ethernet link up.
Oct 2 07:12:03 rc_service: wanduck 189:notify_rc restart_wan_if 0
Oct 2 07:12:06 wan: mac clone: [wan0_hwaddr] == [ac:22:0b:26:22:b6]
Oct 2 07:12:06 pppd[2675]: pppd 2.4.7 started by admin, uid 0
Oct 2 07:12:08 WAN Connection: Fail to connect with some issues.
Oct 2 07:12:11 pppd[2675]: Connected to 00:00:5e:00:01:61 via interface vlan500
Oct 2 07:12:11 pppd[2675]: Connect: ppp0 <--> vlan500
Oct 2 07:12:14 pppd[2675]: PAP authentication failed
Oct 2 07:12:17 rc_service: zcip 2694:notify_rc start_dhcp6c
Oct 2 07:12:18 nat: apply nat rules (/tmp/nat_rules__vlan500)
Oct 2 07:12:19 nat: apply redirect rules
Oct 2 07:12:19 zcip client: configured 169.254.175.33
Oct 2 07:12:20 pppd[2675]: Connection terminated.
Oct 2 07:12:20 pppd[2675]: Modem hangup
Oct 2 07:12:31 pppd[2675]: Connected to 00:00:5e:00:01:61 via interface vlan500
Oct 2 07:12:31 pppd[2675]: Connect: ppp0 <--> vlan500
Oct 2 07:12:34 pppd[2675]: PAP authentication failed
Oct 2 07:12:40 pppd[2675]: Connection terminated.
Oct 2 07:12:40 pppd[2675]: Modem hangup
Oct 2 07:12:50 pppd[2675]: Connected to 00:00:5e:00:01:61 via interface vlan500
Oct 2 07:12:50 pppd[2675]: Connect: ppp0 <--> vlan500
Oct 2 07:12:53 pppd[2675]: PAP authentication failed
Oct 2 07:12:55 syslog: WLCEVENTD wlceventd_proc_event(466): eth2: Deauth_ind 30:96:FB:45:9D:C7, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3)
Oct 2 07:12:59 pppd[2675]: Connection terminated.
Oct 2 07:12:59 pppd[2675]: Modem hangup
Oct 2 07:13:05 syslog: WLCEVENTD wlceventd_proc_event(481): eth2: Disassoc 08:C5:E1:20:D7:B5, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8)
Oct 2 07:13:09 pppd[2675]: Connected to 00:00:5e:00:01:61 via interface vlan500
Oct 2 07:13:09 pppd[2675]: Connect: ppp0 <--> vlan500
Oct 2 07:13:12 pppd[2675]: PAP authentication succeeded
Oct 2 07:13:12 pppd[2675]: peer from calling number 00:00:5E:00:01:61 authorized
Oct 2 07:13:12 pppd[2675]: local IP address 175.143.254.206
Oct 2 07:13:12 pppd[2675]: remote IP address 175.143.255.254
Oct 2 07:13:12 pppd[2675]: primary DNS address 202.188.18.188
Oct 2 07:13:12 pppd[2675]: secondary DNS address 1.9.1.9
Oct 2 07:13:12 rc_service: ip-up 2850:notify_rc start_dhcp6c
Oct 2 07:13:14 nat: apply nat rules (/tmp/nat_rules_ppp0_vlan500)
Oct 2 07:13:14 nat: apply redirect rules
Oct 2 07:13:15 wan: finish adding multi routes
Oct 2 07:13:15 miniupnpd[22341]: shutting down MiniUPnPd
Oct 2 07:13:16 miniupnpd[2902]: version 1.9 started
Oct 2 07:13:16 miniupnpd[2902]: HTTP listening on port 51663
Oct 2 07:13:16 miniupnpd[2902]: Listening for NAT-PMP/PCP traffic on port 5351
Oct 2 07:13:18 kernel: *** ERROR: [udb_shell_mod_exit:661] Udb static = 0, dynamic = 32
Oct 2 07:13:18 WAN Connection: WAN was restored.
Oct 2 07:13:19 nat: apply nat rules (/tmp/nat_rules_ppp0_vlan500)
Oct 2 07:13:21 ntp: start NTP update
Oct 2 07:13:38 kernel: SHN Release Version: 2.0.1 890c91d
Oct 2 07:13:38 kernel: UDB Core Version: 0.2.18
Oct 2 07:13:38 kernel: sizeof forward pkt param = 192
Oct 2 07:13:38 kernel: The For ALL DEVICES flag of Prof 1 has been set to ENABLE
Oct 2 07:13:38 BWDPI: fun bitmap = 47f
Oct 2 07:13:39 kernel: The For ALL DEVICES flag of Prof 1 has been set to ENABLE
Oct 2 07:13:39 nat: apply nat rules (/tmp/nat_rules_ppp0_vlan500)
Oct 2 07:18:20 syslog: WLCEVENTD wlceventd_proc_event(500): eth2: Auth 08:C5:E1:20:D7:B5, status: Successful (0)
Oct 2 07:18:20 syslog: WLCEVENTD wlceventd_proc_event(529): eth2: Assoc 08:C5:E1:20:D7:B5, status: Successful (0)
Oct 2 07:24:51 syslog: WLCEVENTD wlceventd_proc_event(500): eth2: Auth 8C:86:1E:D4:F9:40, status: Successful (0)
Oct 2 07:24:51 syslog: WLCEVENTD wlceventd_proc_event(510): eth2: ReAssoc 8C:86:1E:D4:F9:40, status: Successful (0)
Oct 2 07:29:05 WAN Connection: Failed to authenticate ourselves to peer.
Oct 2 07:29:06 DualWAN: skip single wan wan_led_control - WANRED off
Oct 2 07:29:06 nat: apply redirect rules
Oct 2 07:29:11 WAN Connection: Ethernet link up.
Oct 2 07:29:11 rc_service: wanduck 189:notify_rc restart_wan_if 0
Oct 2 07:29:12 syslog: WLCEVENTD wlceventd_proc_event(466): eth2: Deauth_ind 8C:86:1E:D4:F9:40, status: 0, reason: Disassociated due to inactivity (4)
Oct 2 07:29:13 wan: mac clone: [wan0_hwaddr] == [ac:22:0b:26:22:b6]
Oct 2 07:29:14 pppd[4655]: pppd 2.4.7 started by admin, uid 0
Oct 2 07:29:19 pppd[4655]: Connected to 00:00:5e:00:01:61 via interface vlan500
Oct 2 07:29:19 pppd[4655]: Connect: ppp0 <--> vlan500
Oct 2 07:29:22 pppd[4655]: PAP authentication failed
Oct 2 07:29:24 rc_service: zcip 4675:notify_rc start_dhcp6c
Oct 2 07:29:25 nat: apply nat rules (/tmp/nat_rules__vlan500)
Oct 2 07:29:26 nat: apply redirect rules
Oct 2 07:29:26 zcip client: configured 169.254.175.33
Oct 2 07:29:28 pppd[4655]: Connection terminated.
Oct 2 07:29:28 pppd[4655]: Modem hangup
Oct 2 07:29:38 pppd[4655]: Connected to 00:00:5e:00:01:61 via interface vlan500
Oct 2 07:29:38 pppd[4655]: Connect: ppp0 <--> vlan500
Oct 2 07:29:41 pppd[4655]: PAP authentication failed
Oct 2 07:29:47 pppd[4655]: Connection terminated.
Oct 2 07:29:47 pppd[4655]: Modem hangup
Oct 2 07:29:58 pppd[4655]: Connected to 00:00:5e:00:01:61 via interface vlan500
Oct 2 07:29:58 pppd[4655]: Connect: ppp0 <--> vlan500
Oct 2 07:30:01 pppd[4655]: PAP authentication failed
Oct 2 07:30:07 pppd[4655]: Connection terminated.
Oct 2 07:30:07 pppd[4655]: Modem hangup
Oct 2 07:30:17 pppd[4655]: Connected to 00:00:5e:00:01:61 via interface vlan500
Oct 2 07:30:17 pppd[4655]: Connect: ppp0 <--> vlan500
Oct 2 07:30:20 pppd[4655]: PAP authentication succeeded
Oct 2 07:30:20 pppd[4655]: peer from calling number 00:00:5E:00:01:61 authorized
Oct 2 07:30:20 pppd[4655]: local IP address 175.143.254.194
Oct 2 07:30:20 pppd[4655]: remote IP address 175.143.255.254
Oct 2 07:30:20 pppd[4655]: primary DNS address 202.188.18.188
Oct 2 07:30:20 pppd[4655]: secondary DNS address 1.9.1.9
Oct 2 07:30:20 rc_service: ip-up 4834:notify_rc start_dhcp6c
Oct 2 07:30:22 nat: apply nat rules (/tmp/nat_rules_ppp0_vlan500)
Oct 2 07:30:23 wan: finish adding multi routes
Oct 2 07:30:23 miniupnpd[2902]: shutting down MiniUPnPd
Oct 2 07:30:24 miniupnpd[4886]: version 1.9 started
Oct 2 07:30:24 miniupnpd[4886]: HTTP listening on port 37421
Oct 2 07:30:24 miniupnpd[4886]: Listening for NAT-PMP/PCP traffic on port 5351
Oct 2 07:30:26 WAN Connection: WAN was restored.
Oct 2 07:30:26 kernel: *** ERROR: [udb_shell_mod_exit:661] Udb static = 0, dynamic = 32
Oct 2 07:30:26 ntp: start NTP update
Oct 2 07:30:49 kernel: SHN Release Version: 2.0.1 890c91d
Oct 2 07:30:49 kernel: UDB Core Version: 0.2.18
Oct 2 07:30:50 kernel: sizeof forward pkt param = 192
Oct 2 07:30:50 kernel: The For ALL DEVICES flag of Prof 1 has been set to ENABLE
Oct 2 07:30:50 BWDPI: fun bitmap = 47f
Oct 2 07:30:50 kernel: The For ALL DEVICES flag of Prof 1 has been set to ENABLE
Oct 2 07:30:52 nat: apply nat rules (/tmp/nat_rules_ppp0_vlan500)
Oct 2 07:42:29 syslog: WLCEVENTD wlceventd_proc_event(466): eth2: Deauth_ind 08:C5:E1:20:D7:B5, status: 0, reason: Disassociated due to inactivity (4)
Oct 2 08:34:28 syslog: WLCEVENTD wlceventd_proc_event(500): eth2: Auth 6E:7E:7A:D0:8B:89, status: Successful (0)
Oct 2 08:34:28 syslog: WLCEVENTD wlceventd_proc_event(510): eth2: ReAssoc 6E:7E:7A:D0:8B:89, status: Successful (0)