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You can rather request a certificate from a Certification Authority or generate a self-signed certificate.

Get a certificate from a Certification Authority 

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1. Select one of Certificate Providers that suit your requirements. For instance, SSL.com, Namecheap, TheSSLStore, GoDaddy, GlobalSign, DigiCert, Thawte, GeoTrust, Entrust, Network Solutions, etc.

2. Create a CSR (Certificate Signing Request) either using a Linux shell (PBX shell preferred) or Certificate Provider tools:
   

   Code Block
   language bash title Linux shell command to create CSR
   openssl req -new -newkey rsa:2048 -nodes -keyout server.key -out server.csr

   CSR configuration requires the details as follows below:

   • Common Name (the domain name of PBX). It is highly recommended to use sub-domain wildcard ( *.<yourdomain>.<com> )
     
   • Country (two-letter code)
   • State (or province)
   • Locality (or city)
   • Organization
   • Organizational Unit (Department)

   • E-mail address

3. Keep resulting key and csr files. Its content should include encrypted data and headers :

   -----BEGIN CERTIFICATE REQUEST-----

   ...some data...

   -----END CERTIFICATE REQUEST-----

   and

   -----BEGIN PRIVATE KEY-----

   ....some data...

   -----END PRIVATE KEY-----

4. Order a certificate from one of Certificate Providers and provide them the CSR file

5. Validate domain ownership with CA using one of three validation types: Domain Validated (DV), Organization Validated (OV), Extended Validation (EV) 

   Warning
   Please note that some sub-types require internet connection.

   
   

Generate self-signed certificate 

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Generate certificate on LINUX system using the command:

openssl genrsa -des3 -out server.key 2048
openssl rsa -in server.key -out server.key
openssl req -sha256 -new -key server.key -out server.csr -subj “/C=IT/ST=TN/L=My City/O=My Company/CN=examplecompany.com”
openssl x509 -req -sha256 -days 3650 -in server.csr -signkey server.key -out server.crt

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Output:

server.crt server.csr server.key

Step 2. Configure internal DNS

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1. Login PBX web interface with administrative account
2. Go to WMS Settings -> PBX -> SIP-RTP
3. Upload certificate files: Certificate *.crt and Private Key *.key
4. Click Save

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