Odd - I didn't get Dan's posting... Still, that snip looks vaguely familiar... :-) ________________________________ From: Steve Moffat [mailto:steve@xxxxxxxxxx] Sent: Mon 2/7/2005 7:23 AM To: [ISAserver.org Discussion List] Subject: [isalist] RE: ISA Server Slowdowns... http://www.ISAserver.org Number one should never have been an issue. S ________________________________ From: Ball, Dan [mailto:DBall@xxxxxxxxxxx] Sent: Monday, February 07, 2005 11:21 AM To: ISA Mailing List Subject: [isalist] ISA Server Slowdowns... http://www.ISAserver.org For those of you who have experienced the massive slowdowns that ISA2004 has occasionally, I just recently closed out a case with Microsoft about this. Our problem was most likely due to having multiple DNS settings, once I removed all entries but the ones to our internal DNS server, we haven't experienced a massive slowdown since. Here are some of the major causes, as listed by the ISA Development/Testing crew: ---------- 1 - DNS lookup failures. The longer it takes ISA to resolve a name, or if a lookup fails, the longer it takes to allow / deny the request 2 - Plug-in behavior - if (as in the case of SurfControl), it adds a LOT of domains / content validation points, this can slow ISA to a crawl 3 - ISA policies. The more rules you create and the more complex the rule criteria, the longer it takes for ISA to evaluate them. Generally, you should use as few rules as possible and arrange them thus: - Anonymous Deny - Anonymous Allow - Authenticated Deny - Authenticated Allow ---------- Just thought I'd pass this on in case it helps anyone else... ------------------------------------------------------ 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: World of Windows Networking: http://www.windowsnetworking.com 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: isalist@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist Report abuse to listadmin@xxxxxxxxxxxxx ------------------------------------------------------ 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: World of Windows Networking: http://www.windowsnetworking.com 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 visit http://www.webelists.com/cgi/lyris.pl?enter=isalist Report abuse to listadmin@xxxxxxxxxxxxx ________________________________ Like the T Rex - to which it is not often compared - the haggis has eyes that react to movement. ________________________________ All mail to and from this domain is GFI-scanned.