Well, at least the IP ranges we expect. Most FW use “ANY” or 0.0.0.0/0 for the Internet. It’s basically a catch all. However we can actually define it a bit better than that. If we exclude RFC 1918 spaces, DHCP
Optical Network Check Hack using Mobile Phone
(Caution: Fibre Optics use lasers, don’t look into the SFP, Optics or patch leads) Ever wanted to know if your optics are working and you don’t have a fibre optic tester to hand? You can use the camera on your