Hi Francis, Remove the DNS server service from the ISA firewall, or bind it to the internal interface only. 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: Francis Madera [mailto:Francis_Madera@xxxxxx] Sent: Monday, June 23, 2003 4:05 PM To: [ISAserver.org Discussion List] Subject: [isalist] Warning msg http://www.ISAserver.org 14163 Event Message Server publishing rule [Dns Query server ] that maps IP Int to IP Ext for protocol Dns Transfer zone server failed because the port on the external interface is being used by another application. The Firewall service failed to bind socket for the server on the firewall since another process is using the same port. Check for any other process using the same port and terminate if necessary. What happen with warning msg , what port used for publishing don't 53 or what