At about the same time, the Internet partially disappears?

Question

Computer networks

I don’t know what mysticism is, but at about one in the morning +\- half an hour for 3 nights in a row half of the Internet falls off, for example, Google is working fine, YouTube, maybe some other sites, but 99% of the Internet is stupidly missing, teamweaver shows that the computer is online but I can’t connect, I

thought at first to the router, because they have a reboot once a day? But wifi works.
What is this pi****?

and no matter what I do, only restarting the computer helps, which means 100% it's not about the network and the router

Answer 1

Routers do not reboot once a day (otherwise their flash memory will die) - they have a client ip lease time in the DHCP server settings, usually short, but it is advisable to increase it by a week or more so as not to often rebuild routes.
Apparently, the computer cannot update routes from the router, the Link Layer Topology Discovery (lltd) protocol may be disabled in the network (wi-Fi takes into account breaks, alerts over Beacon Interval, so there is no such thing), if DNS reset ipconfig /flushdns или netsh winsock resetdoes not help,
then it is better to specify a static ip for the cable: in the DHCP settings of the router for each network, specify a permanent internal IP (so that Lan does not disappear), in the computer settings - the specified IP / mask / gateway of the router, respectively.
Approximately similar happens: the Internet freezes for 2~5min a couple of times a day to get an external IP because the DHCP autoconfiguration of [specifically my] provider is updated in 12h (43200sec - lease time), tk. its available subnet has only ~7k. IPv4 addresses, here it proxies and combines as best it can. Previously, the network once every 2-3 .. 6 months tightly disappears from 2 hours to noon, until the routes are configured and he figured it out himself.

For example, the logs show:

Apr  7 05:50:22 udhcpc[1184]: Lease of 10.240.*.* obtained, lease time 43200
Apr  7 11:50:22 udhcpc[1184]: Sending renew...
Apr  7 11:50:24 udhcpc[1184]: Lease of 10.240.*.* obtained, lease time 43200
Apr  7 13:59:07 udhcpd[1066]: Found static lease: 2301a8c0
Apr  7 13:59:07 udhcpd[1066]: Sending ACK to 192.168.1.35
Apr  7 17:50:24 udhcpc[1184]: Sending renew...
Apr  7 17:50:26 udhcpc[1184]: Lease of 10.240.*.* obtained, lease time 43200
Apr  7 17:51:37 pppd[4433]: LCP terminated by peer
Apr  7 17:51:37 pppd[4433]: Connect time 1440.0 minutes.
Apr  7 17:51:37 pppd[4433]: Sent 37511333 bytes, received 75485940 bytes.
Apr  7 17:51:37 pppd: Disable forwarding for ppp0 interface
Apr  7 17:51:37 pppd: Restore netfilter rules from pppd
Apr  7 17:51:38 resolv: Generate resolv DNS1: 45.90.28.213 DNS2: 45.90.30.213
Apr  7 17:51:38 pppd: Restore default gateway
Apr  7 17:51:39 pppd: Flush route cache
Apr  7 17:51:39 pppd: Restart need service and rebuild shaper and iptables rules
Apr  7 17:51:39 services: Restart needed services and scripts. Mode pppd
Apr  7 17:51:40 pppd[4433]: Connection terminated.
Apr  7 17:51:40 pppd[4433]: Sent PADT
Apr  7 17:51:40 pppd[4433]: Modem hangup
Apr  7 17:51:41 iptables: Clear iptables rules fo ipv6 and set default actions.
Apr  7 17:51:41 iptables: Starting IPTABLES
Apr  7 17:51:42 iptables: Set default filters
Apr  7 17:51:42 iptables: Service limit set
Apr  7 17:51:42 iptables: Dnsproxy allow to connect
Apr  7 17:51:42 iptables: Remote managment web limit
Apr  7 17:51:42 iptables: icmp drop ping from wan eth2.2
Apr  7 17:51:42 iptables: Set forward rules
Apr  7 17:51:42 iptables: Add rules for web content filters
Apr  7 17:51:43 iptables: Add QoS rules
Apr  7 17:51:43 QoS: TOS add simple_qos netfilter rules
Apr  7 17:51:44 iptables: Add NAT rules
Apr  7 17:51:44 iptables: Call to add VPN netfilter rules.
Apr  7 17:51:44 dnsserver: Generate /etc/hosts file.
Apr  7 17:51:44 dnsserver: Send HUP to dnsmasq.
Apr  7 17:51:44 dnsmasq[587]: read /etc/hosts - 6 addresses
Apr  7 17:51:44 dnsmasq[587]: using nameserver 45.90.28.213#53
Apr  7 17:51:44 dnsmasq[587]: using nameserver 45.90.30.213#53
Apr  7 17:51:45 pppd[4433]: PPP session is 38429
Apr  7 17:51:45 pppd[4433]: Connected to a4:6c:2a:a5:d8:10 via interface eth2.2
Apr  7 17:51:45 pppd[4433]: Using interface ppp0
Apr  7 17:51:45 pppd[4433]: Connect: ppp0 <--> eth2.2
Apr  7 17:51:45 pppd[4433]: CHAP authentication succeeded
Apr  7 17:51:45 pppd[4433]: CHAP authentication succeeded
Apr  7 17:51:45 pppd[4433]: peer from calling number A4:6C:2A:A5:D8:10 authorized
Apr  7 17:51:45 pppd[4433]: local  IP address 176.118.*.*
Apr  7 17:51:45 pppd[4433]: remote IP address 172.30.*.*
Apr  7 17:51:45 dyndns: Stopping DynDns
Apr  7 17:51:45 dyndns: Starting DynDNS
Apr  7 17:51:46 ntp: Stopping NTPD
Apr  7 17:51:46 ntp: Starting NTPD
Apr  7 17:51:47 vpn-server: Stop l2tp vpn server
Apr  7 17:51:48 pppd: Down is OK
Apr  7 17:51:48 pppd: No dgw stored.
Apr  7 17:51:48 pppd: Replace default route to ppp0
Apr  7 17:51:48 resolv: Generate resolv DNS1: 45.90.28.213 DNS2: 45.90.30.213
Apr  7 17:51:48 pppd: Flush route cache
Apr  7 17:51:48 pppd: Restart dns server, dyndns, ntp sync and rebuild shaper and iptables rules
Apr  7 17:51:49 services: Restart needed services and scripts. Mode pppd
Apr  7 17:51:49 QoS: Stopping SHAPER
Apr  7 17:51:50 QoS: Set default rules.
Apr  7 17:51:50 QoS: TOS Load module.
Apr  7 17:51:50 QoS: TOS Generate /etc/qos_firewall
Apr  7 17:51:51 Prio: port based QoS Load netsched  modules.
Apr  7 17:51:54 iptables: Clear iptables rules fo ipv6 and set default actions.
Apr  7 17:51:54 iptables: Starting IPTABLES
Apr  7 17:51:54 iptables: Set default filters
Apr  7 17:51:55 iptables: Service limit set
Apr  7 17:51:55 iptables: Dnsproxy allow to connect
Apr  7 17:51:55 iptables: Remote managment web limit
Apr  7 17:51:55 iptables: icmp drop ping from wan eth2.2
Apr  7 17:51:55 iptables: Set forward rules
Apr  7 17:51:55 iptables: Add rules for web content filters
Apr  7 17:51:55 iptables: Add QoS rules
Apr  7 17:51:55 QoS: TOS add simple_qos netfilter rules
Apr  7 17:51:56 iptables: Add NAT rules
Apr  7 17:51:56 iptables: Call to add VPN netfilter rules.
Apr  7 17:51:57 dnsserver: Generate /etc/hosts file.
Apr  7 17:51:57 dnsserver: Send HUP to dnsmasq.
Apr  7 17:51:57 dnsmasq[587]: read /etc/hosts - 6 addresses
Apr  7 17:51:57 dnsmasq[587]: using nameserver 45.90.28.213#53
Apr  7 17:51:57 dnsmasq[587]: using nameserver 45.90.30.213#53
Apr  7 17:51:58 dyndns: Stopping DynDns
Apr  7 17:51:58 dyndns: Starting DynDNS
Apr  7 17:51:58 ntp: Starting NTPD
Apr  7 17:52:00 vpn-server: Stop l2tp vpn server
Apr  7 17:52:00 pppd: Enable forwarding for ppp0 interface
Apr  7 17:52:00 pppd: All is start OK
Apr  7 17:52:00 pppd: All is start OK
Apr  7 20:23:04 udhcpd[1066]: Found static lease: 1c01a8c0
Apr  7 20:23:04 udhcpd[1066]: Sending ACK to 192.168.1.28
Apr  7 23:50:26 udhcpc[1184]: Sending renew...
Apr  7 23:50:28 udhcpc[1184]: Lease of 10.240.*.* obtained, lease time 43200
Apr  8 05:50:29 udhcpc[1184]: Sending renew...
Apr  8 05:50:31 udhcpc[1184]: Lease of 10.240.*.* obtained, lease time 43200
Apr  8 11:50:32 udhcpc[1184]: Sending renew...
Apr  8 11:50:34 udhcpc[1184]: Lease of 10.240.*.* obtained, lease time 43200
Apr  8 14:13:41 udhcpd[1066]: Found static lease: 2301a8c0
Apr  8 14:13:41 udhcpd[1066]: Sending ACK to 192.168.1.35

Another option, if the connection allows, is to register the definition of DNS names on the router not from the provider, because. sometimes it is buggy, and through it directly to NextDNS, AdguardDNS or Yandex 77.88.8.7 (it will slightly increase the resolving time + 50ms and make internal subnets inaccessible, if any, but it will cut out ads).
// Quite the way - if the router model is supported and there is enough memory, then update the firmware to something more advanced like Wive-RTNL or OpenWRT, DDwrt if the old firmware is buggy (my router was hacked over the network while it was D-Link); set up Encrypted DNS over-HTTPS/TLS/Quic DNSSEC for privacy, roll up Transmission BT packets, and no interruptions, censorship, or ads are a hindrance.

Answer 2

perhaps external forces?

Answer 3

You need to dig towards malware.
First, check if there are any suspicious programs, and then clean them from viruses using the free Dr.Web CureIt!

Answer 4

This question periodically arises on Habré. Has a bearded history .
In general, this is how your ISP behaves. And not all providers behave this way.