Theoretically I should get 8 MB/s, but over the last 2 months I have hardly been getting 2.5. My ISP claims, on the phone, that my router has a virus in it from a downloaded file. They seemingly have a new technology that can infallibly detect malware in routers from their main office, but I am not sure about that. Maybe they are just lying to me.
The PCs and the other devices connected to it do not show any abnormal behaviour or malfunctions other than the slow signal. No change in DNS, no pop-ups, no redirections, no perceptible anomaly whatsoever.
I have not found anywhere on the Internet any information about malware or virus in a router that does not seriously affect the PC's performance. Even VPN filter was easily felt as it were.
Maybe I am being too suspicious just because Movistar Chile, my ISP, has a bad reputation. Maybe my router is actually infected by a virus. But what kind of virus?
Is there any known virus for routers that specializes in say, stealing information of any kind that is so furtive and discreet so as not cause any evident change in the PC, other than a slow internet speed?
Is there any known virus affecting routers for whatever purpose that has an unwanted collateral effect just slow down the internet with no other consequence in the PC's performance?
I had Bitdefender free installed when the speed slow-down started and I added Bitdefender Home Scanner Free lately which does not detect anything abnormal. Now, I am not sure whether the latter, a small program, is really capable to detect viruses in a router. Either with Wi-Fi or ethernet connection the problem remains the same. Restarting the router is no use. Does anyone knows for sure if ISPs in USA have a technology capable to detect a virus in a router -for ADSL connection- through the telephone cable from their main offices? That is my biggest doubt! If American ISPs do not have that breakthrough, why can we expect a second-rate company like my ISP in Chile, have it? How do they do it? After 3 to 5 minutes at the most of an alleged scanning process. It would not be the first time that an internet provider reduces the speed of a client to make room for new clients in the same area. Or as a way to apply pressure to force you into a more expensive plan.