Hello, We have three ISA servers in our school system. The two oldest boxes are doing fine. I have just built the third. On this new machine we can connect using the web proxy or firewall client, but not using the SecureNAT option. We need to be able to use the SecureNAT feature because this machine is the first machine in a cluster. Does anyone have any idea why the securenat clients cannot connect? Thanks Shane Mullins Wise County Public Schools --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.481 / Virus Database: 277 - Release Date: 5/13/2003