If you are concerned about network security (and it sounds like you need advice pretty badly), might want to dig through existing posts on this site in that regards. Many folks ask those same questions and many folks respond with valued suggestions and opinions. Start searching & researching before you end up on YouTube hacked security cameras
Or start a new topic and see can give you more detailed advice than from this Blue Iris UI3 forum post.
I actually read and search the forum. That's the whole reason why I shut off all the ports on the router. So now the only way to access my LAN is through VPN. Are you saying my cameras are still a security risk?