How many certificates do I need if I have domain & subdomain?

[southbeach]

I just purchased a CA from godaddy.com. They said that if I used a sub-domain mysub.mysite.com and a domain

http://www.mysite.com,

I needed two CAs.

Is this true?

I rather ask here than to believe a sales rep on a 4x4 cubical somewhere in little-dot-ville with little or no knowledge of how these things really work.

If I need to buy a CA for each sub I intend to use, then be it.

Thank you all in advance!

 

[elgrandeperro]

You mean you bought SSL certs? A CA would be you want to create your own certs.

 

[elgrandeperro]

You ( I believe) will need 2. The CERTS are per distinct web site, not per site or domain. So if I had 5 web sites on one server (even in the same domain) I would need 5 CERTS.

 

[southbeach]

OK, I have:

mail.mydomain.com (I am planning on using outlook over https)
track.mydomain.com and

http://www.mydomain.com

That said and based on your answer, I need three certs. Correct?

Thanks

 

[elgrandeperro]

yes, one per site. You might install it on multiple servers in the case of clustering or load balancing, but it is one per distinct sitename.