One-way audio over fortigate FW

[MazenH]

Hi team, I need your help in a one way audio in a network. The design is a bit complex and is a follows: - fortigate acts an internal firewall --> connected to Cisco FW --> Service provider - the voice server is at the service provider premises I can make calls from the internal network to any phone to remote sites (they don' t have Fortigate) or to the phones at the service provider. They can hear me, I can' t hear them. They cannot call me, of course. Phones are registered normally. I tried to bypass the Cisco Firewall for the voice traffic, it didn' t change anything. I enabled " any any" for the voice, I enabled SIP and ICMP and nothing changed (the phones in question are Cisco SIP). Can you please advise on what I can do? Do you require any command outputs? Any help would be appreciated. Regards, Mazen

[tom_a]

Just as an FYI as I had this problem last week. The issue was that I was NATing the traffic. Took the NAT off and all is now good.

Hope this helps someone!

Tom

[CapnJoe]

Had this same issue and disabled NAT on the outbound VPN policy!!