Security Features
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Server Certificate
: When clients request a TLS connection with the IP phone, the phone sends the server cer-
tificate to the clients for authentication. The IP phone has two types of built-in server certificates: a unique server
certificate and a generic server certificate. You can only upload one server certificate to the IP phone. The old
server certificate will be overridden by the new one. The format of the server certificate files must be *.pem and
*.cer and the maximum file size is 5MB.
A unique server certificate
: It is unique to an IP phone (based on the MAC address) and issued by the Yealink
Certificate Authority (CA).
A generic server certificate
: It is issued by the Yealink Certificate Authority (CA). Only if no unique certificate
exists, the phone may send a generic certificate for authentication.
The IP phone can authenticate the server certificate based on the trusted certificates list. The trusted certificates list
and the server certificates list contain the default and custom certificates. You can specify the type of certificates the
IP phone accepts: default certificates, custom certificates or all certificates.
Common Name Validation feature enables the IP phone to mandatorily validate the common name of the certificate
sent by the connecting server. The security verification rules are compliant with RFC 2818.
Note
: Resetting the IP phone to factory defaults will delete custom certificates by default. However, this feature is con-
figurable by the parameter “static.phone_setting.reserve_certs_enable” using the configuration file.
Topic
Supported Trusted Certificates
Supported Trusted Certificates
Yealink phones trust the following CAs by default:
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DigiCert High Assurance EV Root CA
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Deutsche Telekom Root CA 2
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Equifax Secure Certificate Authority
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Equifax Secure eBusiness CA-1
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Equifax Secure Global eBusiness CA-1
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GeoTrust Global CA
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GeoTrust Global CA2
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GeoTrust Primary Certification Authority
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GeoTrust Primary Certification Authority G2
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GeoTrust Universal CA
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GeoTrust Universal CA2
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Thawte Personal Freemail CA
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Thawte Premium Server CA
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Thawte Primary Root CA
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Thawte Primary Root CA - G2
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Thawte Primary Root CA - G3
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Thawte Server CA
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VeriSign Class 1 Public Primary Certification Authority
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VeriSign Class 1 Public Primary Certification Authority - G2
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VeriSign Class 1 Public Primary Certification Authority - G3
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VeriSign Class 2 Public Primary Certification Authority - G2
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VeriSign Class 2 Public Primary Certification Authority - G3
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VeriSign Class 3 Public Primary Certification Authority
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VeriSign Class 3 Public Primary Certification Authority - G2
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VeriSign Class 3 Public Primary Certification Authority - G3
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VeriSign Class 3 Public Primary Certification Authority - G4
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VeriSign Class 3 Public Primary Certification Authority - G5