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6.1 What are the authentication methods of VoIP connection between an originator and terminator?

HostedSwitchsm defines where the call came from by IP address of TCP connection. Each given gateway belongs to one HostedSwitchsm Member, so we can easily define who originated the call. As a measure against false calls HostedSwitchsm verifies the Access Token of the calls. In addition SIP Originated calls are authenticated by username and password set in the Equipment settings.

6.2 How can I prevent my gateways from incoming unauthorized traffic?

You may protect your network with a firewall. Configure the access lists of your firewall in the following way: Deny TCP (at least on ports 1720 and 5060) to/from all external hosts except HostedSwitchsm. Permit UDP (ports higher than 1024, except 5060) to/from all external hosts. Please see a configuration example. Please note that HostedSwitchsm takes all the responsibility for the traffic authorized by HostedSwitchsm At the same time, HostedSwitchsm does not take any responsibility for traffic whose signaling has come from the sources other than HostedSwitchsm.