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I'm trying to find-out how important the "ID type" for a SSL certificate is. I'm trying to generate a cert from my firewall to upload to a CA, but having trouble deciding if I should choose an IP, a domain name, or email for the ID Type (subject information).

Any insight to choosing which one would help (particularly if there is a best practice for VPN SSL certificates).

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1 Answer 1

up vote 4 down vote accepted

Most likely you'll want to use a Domain Name as the subject - but it depends what exactly you're wanting to encrypt using this certificate.

The most common case is access to an SSL port from the internet, for something like SSL-based VPN or an encypting reverse proxy; for that, you'll want the use a Domain Name subject type, and for the data in the subject field you'll want to use the DNS name that clients will be using to access the server - for the VPN use case, that might be something like vpn.example.com.

Let us know what the certificate's going to be for, and we can be more specific.

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Yes, this is for an SSL port on our firewall (SSL-based VPN). Sounds like if an "A" record for the firewall's public IP is forwarded to mainvpn.exmple.com is added in DNS, then my certificate's subject should really be it? –  mrtechalot Jun 6 '12 at 16:09
    
@mrtechalot Yes, that's correct. –  Shane Madden Jun 6 '12 at 16:16
    
Thank you. If you upvote me, I can have upvote rights and give you some extra points. update: scratch that, already have enough to upvote. –  mrtechalot Jun 6 '12 at 16:18

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