I have a Forefront 2010 server in place as a web proxy server. Every few weeks, I notice that our web monitoring server reports false alarms and outages.The 'outages' last for about a minute, then return to normal.
Usually this is resolved by restarting the ISA server, or moving around the DNS server preference order.
My question is this: What is the recommended/best practice DNS setup. THe ISA/Forefront has a LAN and a WAN nic. Currently, I have the LAN nic set to use the internal DCs for DNS and also the ISP DNS servers as a lower priority. The WAN nic uses our ISP DNS servers.
I have read in some docs that it is better to install DNS on the ISA server and let it handle DNS itself, instead of the internal DNS servers doing it?