VoIP SIP trunk - incoming packet dropped "connection to be closed"
we have outgoing calls via SIP trunk working but incoming calls are dropped. In the packet monitor, the reason is "Packet dropped - connection to be closed". I run into this error on yet another location, another firewall, another provider, so I am curious what that could be. In the knowledgebase I haven't found neither helpful explanation of this error, nor troubleshooting steps.
SonicOS 184.108.40.206/220.127.116.11, NAT consistency Off, SIP transformations Off
Any advisory/idea would be highly appreciated.
Category: Entry Level Firewalls
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Hi @janjezek ,
Can you please confirm the NAT Policies are set up appropriately on the firewall for the inbound call flow?
Technical Support Advisor, Premier Services