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certificate requirements


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i am planing to get a wild card certificate for our company name. seems i can only get 2048 certs.

does the pbx work with that?


openssl req -new -newkey rsa:2048 -nodes -keyout server.key -out server.csr


this is how i am planing to generate the request:


Country Name (2 letter code) [AU]:US

State or Province Name (full name) [some-State]:New York

Locality Name (eg, city) []:New York

Organization Name (eg, company) [internet Widgits Pty Ltd]:company LLC

Organizational Unit Name (eg, section) []:company LLC

Common Name (eg, YOUR name) []:*.company.com

Email Address []:mail@company.com


Please enter the following 'extra' attributes

to be sent with your certificate request

A challenge password []:

An optional company name []:




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2048 bit should be okay. If you go for 4096 or even 8192 it should still work, but it would be overkill--especially for the CPU...



The point with the certificates is to build up that trust chain from the Root CA t othe domain certificate. OpenSSL is probably the best tool to get this done. If you keep everything in house (all involved devices can import the Root CA), you dont need to purchase certificates. This also makes it easier if you make a mistake at some point and you have to correct it.


If you purchase snom ONE blue or yellow, it comes with a snom Root CA certificate, so that at least snom devices should trust each other right out the box. Some models (8xx and m9) even have a built-in client certificate, so that the PBX can verify the MAC address when doing the provisioning magic.

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