Reject Message received even if ports and protocols opened

bryanpurple

Hi,
I'm new here and not that much brilliant with Pfsense. Let me explain my issue:
I'm trying to change the carrier on my crm which is Vicidial by the way.
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I've created an inbound campaign to receives call from client.
In order to receive the calls, the traffic should go through my firewall. The thing is that it keeps Rejecting the traffic even if I have open the corresponding port (4569) and also the IP Range for the new carrier (193.111.202.0/24).
I have configure Aliases and NAT on my Pfsense, but I still get rejected when we try calling.

Can someone plse help me with this issue. I have been searching for a solution during the last 3 weeks but in vain.
I thank you in advance for your kind help and the time you will be giving me.
Yours Sincerely
Rasbenny.