site to site tunnel via IPSec - Endian to Cisco ASA

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[gopher_49]

I'm wanting to setup a lab that connects an Endian firewall to a Cisco ASA firewall.  (site to site tunnel).  On the Endian side my datacenter give me a range of public IP's that have ports blocked.  So, I have to open up ports.. So, what ports/protocols do I open to allow the IPSec tunnel to be established?  Also, aside from the access-list I'll need on the Cisco side what other info do I need to create the tunnel on the Cisco side?