Trying to port forward, but I think Telus is blocking the ports

I am having a similar problem. I run a MC server, and I had everything working. I recently had an "upgrade" to wifi boost with a new router and now only some can connect to my server. So far only other Telus customers and Mobile connections can reach the server (tested as telus and Freedom mobile hotspotting). But Shaw residential accounts cannot. First level tech support was able to help. But if they are blocking ports, they are also blocking ip's. Very frustrating.  I have another server that runs on the Steam platform and that one has no problem. Both are running off the same hardware so I know it's not my settings.