Hi Moshood, To host your Exchange Server, you need one static public IP address, also you should have created on your external DNS Server, A-Record points to your static public IP address & MX record. -----Original Message----- From: MOSHOOD ARE [mailto:aremoshood@xxxxxxxxx] Sent: Saturday, June 21, 2003 8:43 AM To: [ISAserver.org Discussion List] Subject: [isalist] RE: ISA http://www.ISAserver.org Thanks Dave, I will check this out. How many public IP addresses do I need on the external network card on the ISA saver. Right now I have just one , that is the one on My MX RECORD. Hope to hear from you. Moshood Confidentiality Notice: This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.