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- TLS is enabled for the SER proxy: see 3.165.1. TLS for SER (UA-Proxy)
- TLS is enabled for the OpenSER proxy: see 3.17. TLS for OpenSER (UA-Proxy)
- A PKI certificate is available that contains the full DNS name of the SIP proxy in the CN field (in this example "sipserver.domainA.net") and a corresponding certificate chain. Using out-of-the-box certificates that come as an example with the default installation of (Open)SER cannot be trusted.
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