My own reco is to go buy a simple router, even if you have only a single computer at your home. Inserting a router between your computer and modem is very, very strong anti-hack stuff, assuming of course you do not compromise your security by clicking on an emailed link or something similar.
A $29.95 Netgear or D-link or any of a dozen other brands of router can be a lifesaver, and if you don’t use it be sure to disable the wireless aspect of the router, if present.
And learn to administer it, as in changing the admin password from the default to a strong password.
I had two machines hooked to my router once. Then, I hooked a printer to one of the machines. Boom ! In a few minutes - I found out about the ridiculous security holes in printer protocols and that networks can by hijacked to make secure tunnels for hacker use. The windows machine was in such bad shape I had to reinstall it.
It’s best to read up on anything you do before you do it (I’m sure everyone agrees !).
“Inserting a router between your computer and modem is very, very strong anti-hack stuff”
Assuming, of course, that the router has packet-sniffing capability. Not all routers are equipped/configured to do that.