@victorn
I use the "manual" method.
0 - I assume you can connect to cops on your Synology in your lan?
1 - find the WAN-ip of your LAN
https://www.whatismyip.com/
The WAN-ip is your public IPv4 address :
123.456.789.123 (example)
2 - find the LAN-ip of your Synology
That's the ip you use to go to the Synology DSM page. Example =
192.168.0.101
3 - login on your router (example
http://192.168.0.1)
4 - Find port forwarding in one of the menu's
then forward port 80 (WAN) to port 80 (LAN) to your Synology LAN-ip =
192.168.0.101
5 - in a browser enter (example):
http://<WAN-ip>/cops
http://123.456.789.123/cops
This should work, it does for me. If not, report back.
If it works, then undo step 4 and first read up on
internet security. Do not open up port 80 to access from the internet if you do not know what you are doing and the security risks that come with it.
At least put a password on COPS.