Bandwith test Need info

Hello we are having trouble it seems someone is trying to speed test with our equipment using none of our user name or password
but also capable to run a bandwidth test with our equipment we did disable the feature don’t nee to know how
but is an universal password is still active in router OS software as root and known to some little unmanageable people
thanks
Gabksy

to protect your router add drop input filter, in IP ==> Firewall ==> filter

only allow input from your network, to access your router.