You could compromise your entire network if checking on your cameras when you're away, if you don't take the necessary security steps.
You should, at least, block your cameras access to the internet, no port forwarding and use a vpn server if accessing your cameras from a public wifi.
This forum is a world of information:
https://ipcamtalk.com/threads/network-security-primer.1123/
https://ipcamtalk.com/wiki/ip-cam-talk-cliff-notes/
Also, check what Dahua says: https://web.archive.org/web/20161007152207/http://www.dahuasecurity.com/best-practices.html
You should, at least, block your cameras access to the internet, no port forwarding and use a vpn server if accessing your cameras from a public wifi.
This forum is a world of information:
https://ipcamtalk.com/threads/network-security-primer.1123/
https://ipcamtalk.com/wiki/ip-cam-talk-cliff-notes/
Also, check what Dahua says: https://web.archive.org/web/20161007152207/http://www.dahuasecurity.com/best-practices.html