Bad Internet connection?

Question

Computer networks

In general, they recently spent the Internet with me, at first everything seemed to be fine. But after a couple of days, he began to frankly work poorly. I measured the speed in speedtest, normal

speed test

But the Internet is working extremely poorly, nothing is loading, Sberbank gives an error

savings bank

Router iskratel rt-gm-3, provider Rosletecom.
What could be the problem and how to solve it?
Rostelecom responds only by calling an employee, but I don’t really want to wait a week for the master.

Answer 1

Most likely a problem with Wi-Fi. Wangyu that everything is OK on the cable.

Answer 2

try to reboot the router the
vast majority of hardware, consumer class, not even cheap, starts to fail even without torrents, sometimes you don’t even understand why and from what, especially Russian providers with their own hardware, I can assume that some of the algorithms for analyzing and filtering traffic are built into their routers , and since usually everyone does it through ... everything is buggy and sausage with incomprehensible consequences
. example - sites are randomly buggy, but a proxy connected via ssh socks in Europe - everything works like a clock.
the solution is to reboot the router if such glitches are suspected (with my eltex router from Rostelecom this happens once a week or two)
ps funny, google savings bank error 20-02 gives a bunch of sites with abstract answers but not a single link to the documentation of the savings bank itself

Answer 3

Is the router overheating by any chance?
If you reboot it - everything is ok?
Problems on the line of the RT itself ... or with the rotary itself, apparently

Answer 4

Without being able to change the router, it will be extremely difficult to establish the cause.
In general, it looks like packet loss, if it is not too big it will manifest itself in this way, the speed test is all ok, and the pages work every other time.
There may also be a problem with DNS.
It is detected after 1000 or more pings to a certain node, for example, Yandex.
The reasons can be anything from problems with the provider's cable or switch, overheating of the router, or overload of the provider's external lines.

Answer 5

from experience: only on these routers and certain models of provider OLTs there is a problem of accessing sites, which could not be solved, more precisely, it was possible, but only by replacing the router with a model from another manufacturer (sercomm, huawei, zte) read rt-gm-1, gm -2 , gm-5.
I work in the RT TP, fought for a very long time with this ...
ps Sberbank and iptv worked extremely badly, wink hung on the black screen very wildly