RE: CA-SSL in IIS

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You have to distribute the CA's Root certificate. Unfortunately, there really isn't an easy way. As for IE, follow the steps below:

1. Open your local Internet Explorer.
2. Select Tools then Internet Options.
3. In the Internet Options window, click on the Content tab, then click on the Certificates button.
4. Select the Trusted Root Certificate Authorities tab, and then click on the Import button.
5. This will start a wizard. Click Next.
6. When prompted, browse to the location of CER file. Click Next to continue.
7. When prompted for the Certificate Store location, click on the Browse button.
8. Check mark Show physical stores, expand Trusted Root Authentication Authorities, and select Local Computer. Click Ok.
9. Make sure that Trusted Root Certification Authorities\Local Computer is in the Certificate store field. Click Next to continue.
10. Click Finish to complete the import process.

That will get the certificate trusted.

Or, you could just right-click on the CER file, select Install, and then just select the defaults.

Chris

• -----Original Message----- From: Benjamin Meade [mailto:ben@lanwest.com.au] Sent: Tuesday, July 15, 2003 6:25 PM To: focus-ms@securityfocus.com Subject: RE: CA-SSL in IIS

OK, I got the certificate installed, but for some reason, most browsers will not install the certificate. Opera won't even try, and IE says it installs, and yet asks if you want to trust this server the next time I go there. Mozilla works fine. I have a feeling that it is because the the CA's root certificate is not available from the web. Am I on the right track? If so, how do I fix it? Can I simply register the CA on the webserver, so when the client goes to install the certificate, it grabs the CA's as well, or do I have to get them to download it seperately?

Thanks,

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Benjamin Meade
System Administrator
LanWest Pty Ltd

• -----Original Message----- From: CORREIA, PATRICK [mailto:pcorreia@cha-llp.com] Sent: Wednesday, 16 July 2003 12:10 AM To: 'Ed Sunder'; focus-ms@securityfocus.com Subject: RE: CA-SSL in IIS

There is a concept involved here of a "chain of trust". When Verisign signs your SSL certificate, they are giving their promise that they trust that you are who you say you are. When Joe User comes to your site, he has to decide if he trusts Verisign to make that decision. The chain can actually be much longer through the use of intermediate certification authorities. A user can "install" a certificate as a trusted root, meaning they trust the holder of that certificate to sign other certificates. This is the benefit of paying a third-party CA -- their root certificate is already trusted by a default install of most browsers, including Internet Explorer.

In terms of the public web, if you sign certificates with your own CA, the certification chain will end with the certificate of your CA, which will not be trusted by most clients. So when they visit your web site, they will see an error message that the site is trying to establish an SSL connection but the identity of the server could not be positively established. This will probably scare people, even though the encryption will still work to the fullest extent. In a controlled environment, you could install the certificate of the CA as trusted on all the client machines and you would have no problems at all.

• -- Patrick Correia, Web Designer Clough, Harbour & Associates LLP III Winners Circle P.O. Box 5269 Albany, New York 12205-0269 http://www.cha-llp.com
• -----Original Message----- From: Ed Sunder [mailto:edsunder@threehd.com] Sent: Tuesday, July 15, 2003 10:50 AM To: focus-ms@securityfocus.com Subject: RE: CA-SSL in IIS

What drawbacks are there in becoming your own certificate service? Versus one of the major SSL services? Other than that the source of the certificate (if the user looked it up) would not be a commercially known provider and you couldn't participate in any of the major provider's ever so valuable certificate programs.

Ed Sunder
Three HD

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