Hi Shane, Two most likely reasons are: 1. Site and Content Rules, or Protocol Rules, require authentication or 2. The SecureNAT clients aren't configured with a DNS server to resolve Internet host names HTH, Tom Thomas W Shinder www.isaserver.org/shinder <http://www.isaserver.org/shinder> ISA Server and Beyond: http://tinyurl.com/1jq1 Configuring ISA Server: http://tinyurl.com/1llp <http://tinyurl.com/1llp> -----Original Message----- From: shane mullins [mailto:tsmullins@xxxxxxxxxxxxxx] Sent: Thursday, May 15, 2003 1:38 PM To: [ISAserver.org Discussion List] Subject: [isalist] SecureNAT problem http://www.ISAserver.org 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