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SIP Trunk - TLS 1.2 - ciphers in use

  • 1.  SIP Trunk - TLS 1.2 - ciphers in use

    Posted 15 days ago

    We're struggling here with implementation of a new SIP trunk. It's of TLS type.
    We are expected (by external telecom provider) to use cipher:  TLS_RSA_WITH_AES_128_CBC_SHA256
    In our sip trunk settings it's the only two in use.

    But when we try to make an outbound call - in network log pcap we can see that some other set of ciphers are being negotiated by our side. Most probably default (those that are in new trunk when you create it) ones.
    So we get handshake failure answer from the other side.
    We're not sure what we're missing here... Are there any other settings that may override the cipher suite being use?
    We're sure proper trunk is in use. Net communication is between proper IP addresses.
    In trunk settings we have:

    Any help would be appreciated.

    Paweł Dragan


    Pawel Dragan
    Lyreco Management SAS