That depends on where the error message comes from. If "ISA Server" is found in the error message, then ISA generated it. If not, the other server did. You may have to "disable friendly error messasges" in IE Advanced settings before you can tell the difference. Also, check your WEBEXT..log for these requsts; your browser may actually be generating garbage in the requests.. Jim Harrison MCP(NT4, W2K), A+, Network+, PCG http://isaserver.org/Jim_Harrison/ http://isatools.org Read the help / books / articles! On Mon, 25 Aug 2003 10:52:56 -0600 "Kenny Clark" <clarkkennyc@xxxxxxxxxxxxx> wrote: http://www.ISAserver.org I have an external website that is occasionally giving me fits. I am getting intermittant http error 400 (13) errors saying invalid data requested. My site and content rules are set to allow all request all the time to all destinations and so are my protocol rules. Is this error always due to the ISA server or is there something else that can cause it. Kenny ------------------------------------------------------ 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')