How can I publish to internet exchange CAS 2010 using TMG

How can I Publish to internet  exchange CAS server using TMG. Do I need a public IP for my exchange CAS server and TMG to publish the same or only for CAS I need the public IP.
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BusbarConnect With a Mentor Solutions ArchitectCommented:
here is a nice link
you don't assign the IP to the CAS, you assign it to the TMG and then configure a listener that maps the real IP to the CAS internal IP
Mkris9Connect With a Mentor Commented:
Can do it through TMG console.

right-click the Firewall Policy node in the console tree
choose New
Exchange Web Client Access Publishing Rule

Go through the wizard. Let me know if you get stuck
Mkris9Connect With a Mentor Commented:
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