Hi I am a newcomer to the ISA in many ways. I have the PIX running nicely on its own running mail to and from our Exchange server to the internet. ISA operates nicely on its own publishing our mail server on the internet. However when I try to place the PIX in front of the ISA with a Public address range in between (we want to terminate VPN at the ISA server later) having of course made all the appropriate changes to the Interfaces and rules it does not want to play ball. Is there anyone out there who has done this and if so could you help me please. Thank you. Don McCall Email: dmccall@xxxxxxxxxx Infrastructure Administrator - Information Systems Baptist Community Services NSW & ACT Website: <www.bcs.org.au> - Telephone: (02) 9941 6054 Fax: (02) 9889 1520 Address: Corporate Services - 157 Balaclava Road Marsfield NSW 2122