Wildcard certificate

We are switching over some of our sites from names like
dekkocustomers.com, dekkosuppliers.com and so on to names like
customers.dekko.com suppliers.dekko.com.
One goal is to be able to use one certificate for all.

When I view the certificate via FF I see:

Website: customers.dekko.com
Issued To
Common Name (CN) *.dekko.com
Organization (O) Group Dekko, Inc
Organizational Unit (OU) <Not Part Of Certificate>

Our external scanning service does an nslookup on the IP address
associated with that website and it returns customers.dekko.com (as it
should). It then compares that to the certificate and says that
customers.dekko.com doesn't match *.dekko.com.

One could argue that the scanning service needs to figure this out. I
haven't got a year to spare on this.

If I just get another certificate and just leave the CN dekko.com instead
of *.dekko.com will this work (as a general rule)?


Rob Berendt