Today, after 4 months of normal operation and NO changes to the servers, ISA Server started blocking outgoing DNS requests. You can see today's logs by following the links below, they were too large to attach... http://www.virtualpublic.com/isalogs/fw.log http://www.virtualpublic.com/isalogs/web.log http://www.virtualpublic.com/isalogs/ip.log You can see in the last log the blocked UDP requests. My rules are set to be wide open and have been working up until now. I can ping in and out, access published websites, and ports, and internal clients can do anything that doesn't require DNS. I dont understand why it started blocking requests!!!! Please advise!