SIP Trunk Lifecell after upgrade to V20

[andrew.p]

Hi,

We have a 3CX v18 instance with Ukraine Lifecell SIP trunks that use TLS. We successfully uploaded the root certificate in V18

Spoiler: Lifecell Certificate

-----BEGIN CERTIFICATE----- MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3 d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD QTAeFw0wNjExMTAwMDAwMDBaFw0zMTExMTAwMDAwMDBaMGExCzAJBgNVBAYTAlVT MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j b20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IENBMIIBIjANBgkqhkiG 9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4jvhEXLeqKTTo1eqUKKPC3eQyaKl7hLOllsB CSDMAZOnTjC3U/dDxGkAV53ijSLdhwZAAIEJzs4bg7/fzTtxRuLWZscFs3YnFo97 nh6Vfe63SKMI2tavegw5BmV/Sl0fvBf4q77uKNd0f3p4mVmFaG5cIzJLv07A6Fpt 43C/dxC//AH2hdmoRBBYMql1GNXRor5H4idq9Joz+EkIYIvUX7Q6hL+hqkpMfT7P T19sdl6gSzeRntwi5m3OFBqOasv+zbMUZBfHWymeMr/y7vrTC0LUq7dBMtoM1O/4 gdW7jVg/tRvoSSiicNoxBN33shbyTApOB6jtSj1etX+jkMOvJwIDAQABo2MwYTAO BgNVHQ8BAf8EBAMCAYYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUA95QNVbR TLtm8KPiGxvDl7I90VUwHwYDVR0jBBgwFoAUA95QNVbRTLtm8KPiGxvDl7I90VUw DQYJKoZIhvcNAQEFBQADggEBAMucN6pIExIK+t1EnE9SsPTfrgT1eXkIoyQY/Esr hMAtudXH/vTBH1jLuG2cenTnmCmrEbXjcKChzUyImZOMkXDiqw8cvpOp/2PV5Adg
06O/nVsJ8dWO41P0jmP6P6fbtGbfYmbW0W5BjfIttep3Sp+dWOIrWcBAI+0tKIJF PnlUkiaY4IBIqDfv8NZ5YBberOgOzW6sRBc4L0na4UU+Krk2U886UAb3LujEV0ls YSEY1QSteDwsOoBrp+uvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQk CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4= -----END CERTIFICATE-----
-----BEGIN CERTIFICATE----- MIIEiTCCA3GgAwIBAgIQAlqK7xlvfg1sIQSyGuZwKzANBgkqhkiG9w0BAQsFADBh MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3 d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD QTAeFw0xNzExMDYxMjIzNTJaFw0yNzExMDYxMjIzNTJaMFwxCzAJBgNVBAYTAlVT MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j b20xGzAZBgNVBAMTElRoYXd0ZSBSU0EgQ0EgMjAxODCCASIwDQYJKoZIhvcNAQEB BQADggEPADCCAQoCggEBAMoIXuVTipccHkMvtoqnVumLhEOorJ16VYJ6FEuGty+P Up8cyrEgW2+6It2mnC142ukGCE6+E6bry7s+uQUMPkrh8DIfE071BsVHc4k+gKOL 8QEkm6OZZpJraK0NLbTNcqL0+ThaZaa0jFPBCBqE+P0u8xF1btxqMSmsDYfMk2B4 3yW6JlmRxoNSNabKnLgoGs7XHO4Uv3ZcZas4HnnpfMxJIyaiUlBm0Flh/6D+mkwM n/nojt4Ji7gVwaQITCacewbb/Yp0W1h+zWOkkS9F8Ho8lAuKfLIFqWeTn2jllWNg 2FiVX+BV75OnETt85pLYZkTgq72nj82khXhBJFTn2AMCAwEAAaOCAUAwggE8MB0G A1UdDgQWBBSjyF5lVOUweMEF6gcKalnMuf7eWjAfBgNVHSMEGDAWgBQD3lA1VtFM u2bwo+IbG8OXsj3RVTAOBgNVHQ8BAf8EBAMCAYYwHQYDVR0lBBYwFAYIKwYBBQUH AwEGCCsGAQUFBwMCMBIGA1UdEwEB/wQIMAYBAf8CAQAwNAYIKwYBBQUHAQEEKDAm MCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wQgYDVR0fBDsw OTA3oDWgM4YxaHR0cDovL2NybDMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0R2xvYmFs Um9vdENBLmNybDA9BgNVHSAENjA0MDIGBFUdIAAwKjAoBggrBgEFBQcCARYcaHR0 cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzANBgkqhkiG9w0BAQsFAAOCAQEARE2F 5d0cgozhZNWokCLfdhhl6mXSOyU3SoPamYcWfLH1CzMwD8a1+pFvwHIQfvlwXFH8 MrjB3C+jVobNbVWRrgqS3Jsa0ltRH/Ffs6ZTgP4WJYm1SNpUbgR7LWUD2F+PTvKB M/gf9eSyqP4OiJslYaa38NU1aVAxZI15o+4xX4RZMqKXIIBTG2V+oPBjQ1oPmHGA C/yWt2eThvb8/re7OpSpUdJyfGf97XeM4PiJAl6+4HQXhjwN7ZPZKrQv9Ay33Mgm YLVQA+x9HONZXx9vvy8pl9bu+NVYWKGxzGxBK0CBozmVUCeXQPJKPTZleYuNM18p U1P8Xh1CDguM+ZEoew== -----END CERTIFICATE-----

However, after upgrading to V20, the trunks worked for approximately 5 days before suddenly stopping, displaying a trunk fail register error.
Upon analyzing the pcap file, I identified a TLS handshake error: https://share.cleanshot.com/wVsSS8R5

Unfortunately, I am currently unable to resolve the TLS issue in v20. As a temporary solution, I have reverted the instance to the snapshot taken before the update. However, I am eager to continue using V20 and would appreciate your assistance in resolving this matter. Could you please provide guidance on how to address the TLS handshake error in V20?

 

[andrew.p]

Lifecell support identified the TLS Client Hello packet in V20 and indicated the presence of the following ciphers:

• Cipher Suite: TLS_AES_256_GCM_SHA384 (0x1302)
• Cipher Suite: TLS_CHACHA20_POLY1305_SHA256 (0x1303)
• Cipher Suite: TLS_AES_128_GCM_SHA256 (0x1301)
• Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (0xc02b)
• Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)
• Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (0xc02c)
• Cipher Suite: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)
• Cipher Suite: TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca9)
• Cipher Suite: TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca8)
• Cipher Suite: TLS_EMPTY_RENEGOTIATION_INFO_SCSV (0x00ff)

However, they specified support for the following ciphers:

• TLS_RSA_WITH_AES_128_CBC_SHA256 (AES128-SHA256)
• TLS_RSA_WITH_AES_256_CBC_SHA256 (AES256-SHA256)
• TLS_RSA_WITH_AES_128_GCM_SHA256 (AES128-GCM-SHA256)
• TLS_RSA_WITH_AES_256_GCM_SHA384 (AES256-GCM-SHA384)

According to Lifecell support, a Handshake Failure error occurs because 3CX lacks support for certain ciphers. Could you please give a comment on this?