I just created a tunnel with cloudflared. it works perfectly with the randomly generated URL cloudflared provides me. I want it to be under my domain, so I have ran
cloudflared tunnel route dns tunnel_name sub_name.mydomain.com
cloudflared tunnel route dns tunnel_name sub_name.mydomain.com
when I try to access sub_name.mydomain.com, I get Error 1033. The randomly generated URL still works.