How to protect outdoor surveillance cameras from lightning at present?

Well, in general, outdoor cameras nowadays, if they are upright, are all equipped with lightning rods, which are grounded through the channels in the rods, and the cameras themselves are also protected against lightning by lightning arresters.

If there is no vertical pole, install lightning arrester at the camera end for lightning protection.

The choice of arrester depends on the camera interface and voltage. Now it is basically two-in-one (video power supply, or network cable interface, power supply) or three-in-one (video, control circuit, power supply). The voltage is basically 24DC or 220AC.