Putting Multiple SSL certs on a single web server that hosts several virtual sites in different domains

I have a server that is running Windows 2003 with IIS 6 that hosts several sites.  Up until recently they where all in the same domain XYZ.COM lets say.  Because of that we have a wild card cert for *.XYZ.COM.  Recently we where asked to change the domain on several of the sites to ABC.COM.  I understand that I can only have one SSL cert per IP/PORT combination.  Is it feasible to run the XYZ.COM sites off of one IP and have the wildcart cert bound to that and then add another static IP on the same server and run ABC.COM off of that IP with a seperate SSL cert for ABC.COM.  In other words:

Current Setup:
1 IIS Site
1 IP
1 Port Shared  443
*.ABC.COM wildcard cert
3 Domain Names

New Setup
2 IIS Sites

Site 1
Original site IP
Port 443
*.ABC.COM wildcard cert

Site 2
New Site IP
Port 443
New test.XYZ.COM cert
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.


yes, you can use the same wildcard cert for different web sites regardless of whether it is on the same or different IP address.

Your plan as posted should work. It sounds like you slighly mis-posted because *.XYZ.COM is the original set of domains, and it should be on site 1. Site 2 would have test.abc.com and would have a new SSL certificate for test.abc.com or *.abc.com. You can't re-use the *.xyz.com SSL certificate for abc.com because it will generate SSL errors on the client.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
> I understand that I can only have one SSL cert per IP/PORT combination.
Unless You configure server to use http://en.wikipedia.org/wiki/Server_Name_Indication
Sadly IIS does not support SNI.
If You can have two different IPs - go ahead, otherwise You would need to put some proxy with SNI support in front of IIS.
keep in mind that SNI requires client support too - so even if you implement this feature, many clients will not be able to access your https site.

TardyAuthor Commented:
kevinhsieh:  Yes I reversed the certs by accident when I wrote the example at the bottom.  Thank you for validating the plan.  Off to testing!
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft IIS Web Server

From novice to tech pro — start learning today.