How to open ports

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KimmyPrice wrote:

I need to plug in the cord that goes to my security cameras as a first step.

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Any LAN port of your router should to the job.

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KimmyPrice wrote:

Then my security camera technician can walk me through setting up the ability to see my cameras from an app on my phone as well!

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Convinced this tech is able to guide you towards installing e.g. TeamViewer (thgis does again not require port forwarding configured) so you can allow him to grant remote control of your computer so he can guide you on using this unknown NVR system, assist you with the reservation of an address so that NVR system does always receive the same LAN IP from the router DHCP server and set-up the port forwarding. Note that you need a public routeable WAN/Internet IP address assigned to your router WAN/Internet port - otherwise there won't be any luck. Clearly a job this tech must be able to deal with and to assist you. If not - you work with the wrong service partner.

This requires at least a little bit affinty to IT, to handle your router, to check yourInternet connection. Forwarding a protocol/port is easy, and certinly described in the fine documentation. To figure out why it might not work - some ideas above - does require some more experience. 

Trustworthy NVR systems offer the remote access e.g. from a mobile App to connect over the vendor cloud. Open ports is a tech from yesterday, mid or long term most of these systems will be hacked or abused.