Guarding Vision is a free service that makes remotely viewing your device easy and generally doesn't require any router changes or port forwarding.
If you didn't enable Hik-Connect/Guarding Vision during the activation of the camera these next few steps will explain how to get it enabled.
Step 1. Configuring DNS Servers
First open up your web browser and type in the IP address of your camera, once you get to the login page go ahead and log in.
Once Logged in, go to Configuration > Network > Basic Network
Make sure the Preferred and Alternate DNS servers at the bottom are the following:
Step 2. Enabling Platform Access
Now go into Advanced Network > Platform Access
Make sure Guarding Vision is selected from the drop down at the top. Next, select the Enable box and input a Verification Code on the window that pops up, we highly recommend making the verification code the same as the password on your camera.
Lastly click Save.
Refresh the page, if everything is correct the status will change to Online.