SSL Certificates


I have started in a new organisation recently and I have received a renewal for a SSL certificate. The vendor is Thawte. I know the certificate we are currently using for Exchange Services is from GeoTrust. My question is is there anyway or application I can use to find out if this Thawte certificate is being used anywhere on our network? The Thawte certificate is mail.domainname whereas our Geotrust is *.domainname. I am pretty sure the wildcard certificate has replaced it, however I need to be sure before I let it expire.

Thanks in advance.
Josh RoweSystems AdministratorAsked:
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this information can be provided by the different teams only and there is no way to find which app is using the certificate untull and unless its documents.
Dave HoweSoftware and Hardware EngineerCommented:
you could use a scanner to find instances. Take a look at (for example) :D
Josh RoweSystems AdministratorAuthor Commented:
Thanks Dave, I have not used NMAP before, it looks it could do what we need.
Dave HoweSoftware and Hardware EngineerCommented:
NMap is the canonical portscanner - there are others, but so many vuln scanners start by running NMap to do the heavy lifting for them, it is now the industry standard :D

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