Hi Karim, If you have an internal DNS server that can resolve Internet host names, then you should use that one. Otherwise, use an external DNS server. HTH, Tom Thomas W Shinder www.isaserver.org/shinder <http://www.isaserver.org/shinder> http://tinyurl.com/1jq1 <http://tinyurl.com/1jq1> http://tinyurl.com/1llp <http://tinyurl.com/1llp> -----Original Message----- From: karim kouider elouahed [mailto:klm_algerie@xxxxxxxxxxx] Sent: Friday, January 24, 2003 2:53 PM To: [ISAserver.org Discussion List] Subject: [isalist] RE: SecureNat Config http://www.ISAserver.org Hi ALL Thank U Dr. TOM what DNS server I configure the client SecureNat (internal DNS or EXternal DNS )? and how configure the SecureNAT clients with the address of such a DNS server.? Thank u Dr. TOM. karim