Hello everyone , My client uses Cisco Webex softphone on his Lan machines . I have opened the ports : 1) 5062,8934,6970 TCP 2) 5004,9000 , 8500-8700 UDP 3) SIP : 5060-5070 TCP . But the client can't make calls , but it works when he switchs to his mobile connection . Do you think there may be other ports that I should open on the Firewall rules ?? P.S : the ports 443 , 80 , 53 , 123 are also opened . Thank you .
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