The best firewall

[Chimp Paradox]

Traditionally Ive always just deactivated it as they annoy me. Since starting my photography business however I should start using one. Shall I use windows or something else?

Thanks!

 

[Chimp Paradox]

In particular, what is the point of software firewall if you have a hardware firewall in your router? Thanks

 

[Chimp Paradox]

What exactly is LAN to LAN? Thank you!