You can record anything visible from a public space (your front porch looking at the street). You cannot intentionally record areas where a person has a "reasonable expectation of privacy," such as:
Do not hoard footage. If nothing happened on Tuesday at 2 PM, you do not need to keep that video. Set your system to overwrite footage every 30 or 60 days. Stored data is a liability. Asian Hidden Camera Couples Escorts Pack 531