Help with ifttt and webhooks I'm stuck!

Hi, I’m very new to HA. This will probably sound stupid… Can anyone tell me what format the URL should be in for a ifttt web hook request. I’m trying to switch a flashed sonoff on. from alexa (alexa is just for test purposes). For the life of me I can’t get it to work I have set up duck dns and all the other bit as per instructions. I can access my HA from https://my-dns.duckdns.org/8123. so that bits ok. I’m at a loss Please help

Capture2

more likely https://my-dns.duckdns.org:8123

check the url…

Thank you! I spotted that shortly after Id posted. also had a problem with port forwarding . I can at least get the webhooks to go through now. I just need to play with it a bit.