Would IFTTT be possible to integrate?

[SERGIO]

Yes, use ddns service, there are plenty of free ones.  I use no-ip.com

So, It would remain as: http://username:password@public_hostname:port/scada-remote?m=json&r=grp&fn=write&alias=1/1/1&value=50 , right?

Note: Username and password of your router credentials?

Best regards