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Selecting Enable SIP Transformations transforms SIP messages between LAN (trusted) and WAN/DMZ (untrusted). You need to check this setting when you want the firewall to do the SIP transformation. If your SIP proxy is located on the public (WAN) side of the firewall and SIP clients are on the LAN side, the SIP clients by default embed/use their private IP address in the SIP/Session Definition Protocol (SDP) messages that are sent to the SIP proxy, hence these messages are not changed and the SIP proxy does not know how to get back to the client behind the firewall. Selecting Enable SIP Transformations enables the firewall to go through each SIP message and change the private IP address and assigned port. Enable SIP Transformation also controls and opens up the RTP/RTCP ports that need to be opened for the SIP session calls to happen. NAT translates Layer 3 addresses but not the Layer 7 SIP/SDP addresses, which is why you need to select Enable SIP Transformations to transform the SIP messages.
SIP:[email protected];user=phone SIP URL with global phone number and specified gateway. SIP:+1 206 [email protected];user=phone SIP URL with global phone number format and specified gateway. So, if you have a SIP application installed, you should try one of the mentioned SIP URLs.
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Session Initiation Protocol (SIP) Torture Test Messages., Maag S. SIP ALG Detector (Mac OS)- Used to check networks for SIP ALG; Other Tools Used By Intermedia Technicians. Test Tools Network Analyze r or 'Sniffer' A Network Analyzer captures streams of packets from an Ethernet link, decodes each packet and displays the decodes and related. In order to test your VoIP provider's network, you'll have to send pings and traceroutes to the server that is providing your VoIP service. For OnSIP Hosted PBX customers, we recommend testing sip.onsip.com. Talk to your provider to verify which destination to ping.