Hi Dan, Do you have an AD integrated DNS system, because as I said, clearing the cache only clears the resolver cache, not the internal Zones. Something seriously wrong there if your zones are disappearing. Steve -----Original Message----- From: Ball, Dan [mailto:DBall@xxxxxxxxxxx] Sent: Wednesday, March 02, 2005 6:09 PM To: ISA Mailing List Subject: [isalist] RE: Interesting problem... http://www.ISAserver.org I'm right-clicking on server and selecting "Clear Cache", is this not the proper way? If I had to guess what is happening, when I clear the cache, it also removes the entries for the domain controllers and other servers, even though they are static IPs. Thus, the ISA server cannot find a DC to authenticate users, and they get blocked. (Due to Federal requirements, we cannot have any Firewall Policies that allow unauthenticated access to the Internet.) If I log onto each DC and do a "repair" of the network connection, it shows back up in the DNS server. Otherwise, I have to either wait for it to refresh itself or reboot the server. -----Original Message----- From: Steve Moffat [mailto:steve@xxxxxxxxxx] Sent: Wednesday, March 02, 2005 16:30 To: [ISAserver.org Discussion List] Subject: [isalist] RE: Interesting problem... http://www.ISAserver.org I still don't understand this Dan. The cache on the DNS servers is for resolved names outwith your Organization. The AD holds all your domain info. When you clear the cache, it shouldn't be interfering with name resolution in your AD zones. You are right clicking on the dns server and selecting clear cache, or ipconfig / flushdns?? Steve ------------------------------------------------------ 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 The haggis is unusual in that it is neither consistently nocturnal nor diurnal, but instead is active at dawn and dusk (crepuscular), with occasional forays forth during the day and night.