Как найти проблему с Asus RT-N66U и Yota LTE?

Добрый день!

Уже который месяц пытаюсь наладить работу интернета у себя дома. Интернет работает через модем Yota LTE, модем подключен к роутеру Asus RT-N66U,
который раздаёт интернет через Ethernet и Wi-Fi. Однако время, от времени начинаются проблемы с интернетом (не все запросы выполняются, некоторые сайты открываются, некоторые - нет).

Вот лог с роутера:
Jun  8 12:43:16 miniupnpd[24047]: Expired NAT-PMP mapping port 8787 UDP removed
Jun  8 12:43:16 miniupnpd[24047]: Expired NAT-PMP mapping port 8787 TCP removed
Jun  8 16:01:33 rc_service: hotplug 27177:notify_rc stop_rdnssd
Jun  8 16:01:33 rc_service: hotplug 27177:notify_rc stop_radvd
Jun  8 16:01:33 rc_service: waitting "stop_rdnssd" via hotplug ...
Jun  8 16:01:34 stop_wan(): perform DHCP release
Jun  8 16:01:37 WAN Connection: Ethernet link up.
Jun  8 16:01:37 rc_service: wanduck 314:notify_rc restart_wan_if 1
Jun  8 16:01:37 stop_wan(): perform DHCP release
Jun  8 16:01:45 WAN Connection: Ethernet link down.
Jun  8 16:01:45 rc_service: wanduck 314:notify_rc restart_wan_if 1
Jun  8 16:01:45 stop_wan(): perform DHCP release
Jun  8 16:01:48 rc_service: wanduck 314:notify_rc restart_wan_if 0
Jun  8 16:01:48 stop_wan(): perform DHCP release
Jun  8 16:01:48 kernel: Attempt to kill tasklet from interrupt
Jun  8 16:01:55 miniupnpd[24047]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  8 16:01:55 miniupnpd[24047]: Failed to get ip address for interface eth3
Jun  8 16:02:51 miniupnpd[24047]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  8 16:02:51 miniupnpd[24047]: Failed to get ip address for interface eth3
Jun  8 16:02:52 miniupnpd[24047]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  8 16:02:52 miniupnpd[24047]: Failed to get ip address for interface eth3
Jun  8 16:02:54 miniupnpd[24047]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  8 16:02:54 miniupnpd[24047]: Failed to get ip address for interface eth3
Jun  8 16:02:56 rc_service: wanduck 314:notify_rc restart_wan_if 0
Jun  8 16:02:56 stop_wan(): perform DHCP release
Jun  8 16:02:56 kernel: Attempt to kill tasklet from interrupt
Jun  8 16:02:58 miniupnpd[24047]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  8 16:02:58 miniupnpd[24047]: Failed to get ip address for interface eth3
Jun  8 16:03:00 rc_service: wanduck 314:notify_rc restart_wan_if 1
Jun  8 16:03:00 stop_wan(): perform DHCP release
Jun  8 16:03:03 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth3_eth3)!
Jun  8 16:03:03 rc_service: udhcpc 27283:notify_rc stop_upnp
Jun  8 16:03:03 miniupnpd[24047]: received signal 15, good-bye
Jun  8 16:03:03 rc_service: udhcpc 27283:notify_rc start_upnp
Jun  8 16:03:03 miniupnpd[27312]: HTTP listening on port 51238
Jun  8 16:03:03 miniupnpd[27312]: Listening for NAT-PMP traffic on port 5351
Jun  8 16:03:03 dhcp client: bound 10.0.0.10 via 10.0.0.1 during 604800 seconds.
Jun  8 16:03:08 WAN Connection: WAN was restored.
Jun  8 16:03:11 miniupnpd[27312]: HTTP Connection from 192.168.1.183 closed unexpectedly
Jun  8 17:21:13 miniupnpd[27312]: Expired NAT-PMP mapping port 8787 UDP removed
Jun  8 17:21:14 miniupnpd[27312]: Expired NAT-PMP mapping port 8787 TCP removed
Jun  8 19:10:11 kernel: nf_ct_ras: decoding error: out of range
Jun  8 20:45:56 rc_service: httpd 328:notify_rc start_webs_update
Jun  8 20:49:28 rc_service: httpd 328:notify_rc start_webs_update
Jun  8 21:53:10 miniupnpd[27312]: Expired NAT-PMP mapping port 8787 UDP removed
Jun  8 21:53:10 miniupnpd[27312]: Expired NAT-PMP mapping port 8787 TCP removed
Jun  8 23:50:44 miniupnpd[27312]: Expired NAT-PMP mapping port 8787 UDP removed
Jun  8 23:50:44 miniupnpd[27312]: Expired NAT-PMP mapping port 8787 TCP removed
Jun  9 02:05:11 kernel: nf_ct_ras: decoding error: out of range
Jun  9 15:00:23 miniupnpd[27312]: Expired NAT-PMP mapping port 8787 UDP removed
Jun  9 15:00:23 miniupnpd[27312]: Expired NAT-PMP mapping port 8787 TCP removed
Jun  9 16:07:14 rc_service: hotplug 30533:notify_rc stop_rdnssd
Jun  9 16:07:14 rc_service: hotplug 30533:notify_rc stop_radvd
Jun  9 16:07:14 rc_service: waitting "stop_rdnssd" via hotplug ...
Jun  9 16:07:15 stop_wan(): perform DHCP release
Jun  9 16:07:16 WAN Connection: Fail to connect with some issues.
Jun  9 16:07:16 stop_nat_rules: apply the redirect_rules!
Jun  9 16:07:21 rc_service: wanduck 314:notify_rc restart_wan_if 1
Jun  9 16:07:21 stop_wan(): perform DHCP release
Jun  9 16:07:25 rc_service: wanduck 314:notify_rc restart_wan_if 0
Jun  9 16:07:25 stop_wan(): perform DHCP release
Jun  9 16:07:25 kernel: Attempt to kill tasklet from interrupt
Jun  9 16:08:05 miniupnpd[27312]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  9 16:08:05 miniupnpd[27312]: Failed to get ip address for interface eth3
Jun  9 16:08:06 miniupnpd[27312]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  9 16:08:06 miniupnpd[27312]: Failed to get ip address for interface eth3
Jun  9 16:08:08 miniupnpd[27312]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  9 16:08:08 miniupnpd[27312]: Failed to get ip address for interface eth3
Jun  9 16:08:12 miniupnpd[27312]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  9 16:08:12 miniupnpd[27312]: Failed to get ip address for interface eth3
Jun  9 16:08:20 miniupnpd[27312]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Jun  9 16:08:20 miniupnpd[27312]: Failed to get ip address for interface eth3
Jun  9 16:08:29 rc_service: wanduck 314:notify_rc restart_wan_if 0
Jun  9 16:08:29 stop_wan(): perform DHCP release
Jun  9 16:08:29 kernel: Attempt to kill tasklet from interrupt
Jun  9 16:08:33 rc_service: wanduck 314:notify_rc restart_wan_if 1
Jun  9 16:08:33 stop_wan(): perform DHCP release
Jun  9 16:08:36 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth3_eth3)!
Jun  9 16:08:36 rc_service: udhcpc 30642:notify_rc stop_upnp
Jun  9 16:08:36 miniupnpd[27312]: received signal 15, good-bye
Jun  9 16:08:36 rc_service: udhcpc 30642:notify_rc start_upnp
Jun  9 16:08:36 miniupnpd[30671]: HTTP listening on port 36271
Jun  9 16:08:36 miniupnpd[30671]: Listening for NAT-PMP traffic on port 5351
Jun  9 16:08:36 WAN Connection: WAN was restored.
Jun  9 16:08:36 dhcp client: bound 10.0.0.10 via 10.0.0.1 during 604800 seconds.
Jun  9 20:16:28 kernel: nf_ct_ras: decoding error: out of range
Jun 10 10:29:08 kernel: nf_ct_ras: decoding error: out of range
Jun 10 16:12:57 rc_service: hotplug 1351:notify_rc stop_rdnssd
Jun 10 16:12:57 rc_service: hotplug 1351:notify_rc stop_radvd
Jun 10 16:12:57 stop_wan(): perform DHCP release
Jun 10 16:12:59 WAN Connection: Fail to connect with some issues.
Jun 10 16:12:59 stop_nat_rules: apply the redirect_rules!
Jun 10 16:13:04 WAN Connection: Ethernet link up.
Jun 10 16:13:04 rc_service: wanduck 314:notify_rc restart_wan_if 1
Jun 10 16:13:04 stop_wan(): perform DHCP release
Jun 10 16:13:11 WAN Connection: Ethernet link up.
Jun 10 16:13:11 rc_service: wanduck 314:notify_rc restart_wan_if 1
Jun 10 16:13:11 stop_wan(): perform DHCP release
Jun 10 16:13:14 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth3_eth3)!
Jun 10 16:13:14 rc_service: udhcpc 1449:notify_rc stop_upnp
Jun 10 16:13:14 miniupnpd[30671]: received signal 15, good-bye
Jun 10 16:13:14 rc_service: udhcpc 1449:notify_rc start_upnp
Jun 10 16:13:14 dhcp client: bound 10.0.0.10 via 10.0.0.1 during 604800 seconds.
Jun 10 16:13:14 miniupnpd[1478]: HTTP listening on port 44672
Jun 10 16:13:14 miniupnpd[1478]: Listening for NAT-PMP traffic on port 5351
Jun 10 16:13:19 WAN Connection: WAN was restored.
Jun 10 21:11:42 miniupnpd[1478]: Expired NAT-PMP mapping port 8787 UDP removed
Jun 10 21:11:42 miniupnpd[1478]: Expired NAT-PMP mapping port 8787 TCP removed
Jun 11 12:38:30 miniupnpd[1478]: Expired NAT-PMP mapping port 8787 UDP removed
Jun 11 12:38:30 miniupnpd[1478]: Expired NAT-PMP mapping port 8787 TCP removed
Jun 11 16:10:55 miniupnpd[1478]: Expired NAT-PMP mapping port 8787 UDP removed
Jun 11 16:10:55 miniupnpd[1478]: Expired NAT-PMP mapping port 8787 TCP removed
Jun 11 16:18:37 rc_service: hotplug 4603:notify_rc stop_rdnssd
Jun 11 16:18:37 rc_service: hotplug 4603:notify_rc stop_radvd
Jun 11 16:18:38 stop_wan(): perform DHCP release
Jun 11 16:18:38 WAN Connection: Fail to connect with some issues.
Jun 11 16:18:38 stop_nat_rules: apply the redirect_rules!
Jun 11 16:18:44 rc_service: wanduck 314:notify_rc restart_wan_if 1
Jun 11 16:18:44 stop_wan(): perform DHCP release
Jun 11 16:18:47 rc_service: wanduck 314:notify_rc restart_wan_if 0
Jun 11 16:18:47 stop_wan(): perform DHCP release
Jun 11 16:18:47 kernel: Attempt to kill tasklet from interrupt
Jun 11 16:19:52 rc_service: wanduck 314:notify_rc restart_wan_if 0
Jun 11 16:19:52 stop_wan(): perform DHCP release
Jun 11 16:19:52 kernel: Attempt to kill tasklet from interrupt
Jun 11 16:19:56 rc_service: wanduck 314:notify_rc restart_wan_if 1
Jun 11 16:19:56 stop_wan(): perform DHCP release
Jun 11 16:19:59 start_nat_rules: apply the nat_rules(/tmp/nat_rules_eth3_eth3)!
Jun 11 16:19:59 rc_service: udhcpc 4709:notify_rc stop_upnp
Jun 11 16:19:59 miniupnpd[1478]: received signal 15, good-bye
Jun 11 16:19:59 rc_service: udhcpc 4709:notify_rc start_upnp
Jun 11 16:19:59 dhcp client: bound 10.0.0.10 via 10.0.0.1 during 604800 seconds.
Jun 11 16:19:59 miniupnpd[4738]: HTTP listening on port 36928
Jun 11 16:19:59 miniupnpd[4738]: Listening for NAT-PMP traffic on port 5351
Jun 11 16:19:59 WAN Connection: WAN was restored.
Jun 12 00:23:51 miniupnpd[4738]: unsupported NAT-PMP version : 2
Jun 12 13:05:54 rc_service: httpd 328:notify_rc start_webs_update


В чем может быть проблема? Она в роутере? Или в yota-е?

Так же по Ethernet через свитч TEG-S24g подключён второй роутер для раздачи Wi-Fi Asus EA-N66, но иногда он отваливается и интернет перестаёт работать вообще (это нормально ли? как определить почему так происходит?).
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Ответы на вопрос 1
@Wilix
Столкнулся с похожей проблемой. Скорее всего дело в значениях MTU. Видимо или сам модем или то, что стоит за модемом (на стороне ёты) не пропускает пакеты длинной 1500.
Как вариант, попробуйте уменьшить значение MTU для модема (у меня через web-интерфейс не получилось, просто нет такой настройки).
Я подключился через telnet и добавил правило в роутер
iptables -t mangle -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

Вот более подробная статья по теме, почитайте комментарии, там есть примеры других правил.
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