It can't be done. This means "no workaround", too. It's a known limitation in ISA because of how ISA uses the Windows TCP/IP stack. By default, all traffic leaving a Windows server leaves on the default IP. Jim Harrison MCP(NT4, W2K), A+, Network+, PCG http://isaserver.org/Jim_Harrison/ http://isatools.org Read the help / books / articles! On Mon, 29 Dec 2003 15:27:59 +0530 Risun Antony <risuna@xxxxxxxxxxxxx> wrote: http://www.ISAserver.org Hi all Well Tom, i have gone through you article, http://isaserver.org/tutorials/You_Cannot_Control_the_Source_IP_Address_on_the_External_Interface_of_the_ISA_Server.html. I also understand that this is by design. But is there a work around for the same? I need to publish multiple Mail Servers and it can be only done if i make the ISA to send outbound messages using the IP address i bind it to. Risun Antony Technical Support Engineer Oriensoft Technologies Pvt. Ltd. Tel: +91-22-56975275 Fax: +91-22-56976764 ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: jim@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')