We have ISA server in Integrated mode. We have 8 files servers in DMZ and 2 in the internal network. All those servers are SecureNat client. We use arcserve Enterprise edition on the exchange server in the internal network with HP Ultrium tape backup. The others files servers are setup with the arcerve agent using the port 6050 including ISA. It means, ISA use port 6050 for it's own Arcserve Agent. Actually, the backup server can connect with arcserve agent on ISA server and the others Intranet files servers but not with any of the DMZ servers So How can I configure ISA to take the backup of DMZ files servers ? Thanks for your help ----------------------------------------------------------- Mario Simard, ing TÉLÉNET Informatique inc. Tél.: (418) 545-7070 Fax.: (418) 545-2230 http://www.telenetinfo.com <http://www.telenetinfo.com/> http://www.viago.net <http://www.viago.net/> -----------------------------------------------------------