Viber cannot make Group calls pfsense is blocking it

  • Hi Guys,

    All viber function and services is working on my 2 networks except when the user is making a viber group or joining a group calls. For intance, i am connected in my network and if i call somebody using viber both incoming and outgoing is ok but if i add another one on the calls which make the meeting a group call then myself will be drop automatically and vice versa

    I got this issue which affecting my two sites, which i use pfsense for both network.

    I also allowed the following ports as suggested by viber documentation
    but still i am having the same issue.

    Hoping for you help guys.

    Thank you,

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