How many firewalls...?
I use a BT Router wirelessly with my Mac Mini....
The Router has a supposed "built-in" firewall which, at present, is showing as being active...
My Mac also shows a firewall activated via System Preferences / Security...
- Do I need both...?
- If both are on, will it cause issues...?
Thanks.
Mac mini, OS X Mavericks (10.9.4)