Hi All, I have here an interesting problem that I have encountered with SBS2000. Server is running two nic cards and a router. 1 external nic has router plugged in directly. Router: 10.5.4.1/24 Nic: 10.5.4.10/24 GW: 10.5.4.1 DNS: ISP 2 nic is the Local Network: nic: 192.168.1.1/24 GW: Nothing DNS: 192.168.1.1 LAT: 192.168.1.0 - 255 Problem is that the server cannot connect to any winsock applications via SecureNat, the web browser works with the web proxy, but for the likes of exchange server/telnet or antivirus updates it will fails to connect. The computers on the private lan work faultlessly with or without the firewall client. However if I put the external network card in the lat entry 10.5.4.10 - 10.5.4.10, the server sees it as local and works fine, but then it defeats the purpose of securing the LAT, and the lan clients will require the firewall client. Looked under the IPEXD..... files from the ISA Server logs, it says that it has blocked 10.5.4.10 at port 25, so I opened up a packet filter to allow outbound access SMTP for the external nic, but still doesn't work. This seems pretty straight forward stuff, but I feel that I have maybe overlooked something?? Anyone with any ideas? Regards, Chris Hatton Information Systems Engineer ____________________________________________________________________ CAUTION - This message may contain privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify Safe Air Ltd immediately. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of Safe Air. _____________________________________________________________________ For more information on the Safe Air Group, visit us online at http://www.safeair.co.nz/ _____________________________________________________________________