My network is hacked, I’m going to remove the malware from my computer and buy a firewall. The problem is the hacker knows my login to my isp and if I change my password they can recover it because they know my details. On my isp account it contains my IP address and MAC address of my modem, can they hack into my network again with the knowledge of my IP address and modem MAC address even if I have a firewall installed, I was told my firewall would block the hack? a Firewall wouldn’t do anything if they hacked my modem before I installed my firewall to my network because they have my ip and MAC address in my isp account. What’s your view on this subject?