I was wondering if i buy a router and use that instead, can it prevent them from doing such action, snooping etc?
And until i have a chance to get one if i block the isp ip's that are constantly connecting when i browse will that prevent in some degree the data leakage.
I don't kind of understand, in this case, what it helps if you block your isp's connection to that "backdoor", because when you browse (with browsing you propably meant browsing interwebs?) , you are anyways sending your browsing data "to them". After all it's your internet service provider we are speaking of here. I understand generally that you don't want your isp to have backdoor to your router/modem but in this particular case it doesn't imo do any difference.
Btw, if you do what 2460h1 suggested and take isp's router off completly, you should make sure you can spoof/clone your new routers/modem mac address to have old ones(=isp's router) address. Many isp's(at least where i live) that supplies routers to their customers, "link" the internet acces so it's only available when connection is made through their router/modem and it's ofc. verified by mac-address. Maybe tho every modern router has mac spoofing option these days, don't know. All my routers have had, if i can remember correctly.
