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Goals
The SR140 fax server will be deployed behind a NAT device, e.g. in AWS EC2. The media server will have a private IP address. SIP and RTP traffic will traverse the local NAT device.
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Solution: Allow the setting of an IP address that will be used to modify the SIP headers, such as From and Contact, as well as the SDP headers defining the RTP connection information to the external IP of the EC2 instance.
The SR140 needs to be aware of the NAT device's public IP address. This public IP address will be used in place of the private IP address. This setting can be a single value for the whole system assigned when SR140 starts (in configuration file).
Assumptions
Requirements
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