Internet keeps dropping out, what should I do?

Question

Computer networks

Hello!
Please tell me what could be the problem in the systematic disappearance of the Internet at night, once a day, before you reboot the switch, after it appears and disappears again at night, the switch is also connected to it and a wi-fi modem is connected, the Internet goes to everyone through a proxy

Answer 1

The provider has an automatic reboot of the equipment at night, but something has been done crookedly. For example, it starts working after updating the lease of your address via DHCP, and your piece of iron does not see the need for this if the previous lease has not expired. This is on the conscience of the provider, and questions to him.
But there is another version when the provider is not to blame. These are night power surges or blackouts for about 1 second (yes, I myself observed that this can be regular, almost every night), as a result of which your switch may freeze. Especially if the switch and / or its power adapter is old (capacitors degrade over the years and do not hold power surges).

there is a switch to it and a wi-fi modem is also connected

I also bet that the switch will actually not be a switch, because "wi-fi modem" is 100% not a modem.