IIS and client certificate

Hi,

I have SBS2003.
I would expose exchange web in internert and intranet.
For intranet I would secure with IP filter.
For internet I would secure witch client certificate.
Now can I combine this methods? That is a person in my intranet that
haven't the certificate can access , because the IP is secure. A person
in internet with client trusted certificate can access also if he
hasn't an IP in the range.

It is possible and if yes what are the configuration?

Thanks

.

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