> Thanks for your valuable suggestion. Rightnow i had 2 nics one for > private address and other for public. Shall i install 3rd one or not? and > where will be the option for exchange to listen all ip addressess?..Dont > think otherwise im in a starting stage? Red Flag on play! You have 2 NICs, one with a private IP and one with a public IP? Do you know what kind of security risk that is? Is the public IP behind a firewall? John Tolmachoff Engineer/Consultant/Owner eServices For You