We have two Win 2003 Servers (physical) running ISA 2006 SP1 in a NLB cluster (ISA-integrated). Both have 2 interfaces (Int: 172.16.210.x and Ext: 172.16.214.x). Both NICs of ISA1 reside on Secondary Switch and ISA2 on Primary switch. HA have been tested in past. We have our FTP and Web servers (residing in DMZ n/w 172.16.210.x). Oftenly, ISA2 start sending FTP traffic using Ext NIC instead of Int NIC which results in FTP time out as the handshake won't complete. When it happens, this is only specific to FTP traffic and rest of published applications are not affected. Simple reboot of ISA2 resolves it. Both Nodes are identical in terms of OS, networking, routing information etc. ISA2 was formatted to downgrade from Win 2003 Ent to Std edition few months ago. ISA BPA gives no relevant failure. Both Nodes are in full sync and changes replicate. Kindly suggest a solution for this intermittent issue.

On Fri, 28 Sep 2012 17:48:09 +0000, G S Birdi wrote: We have two Win 2003 Servers (physical) running ISA 2006 SP1 ISA and TMG have their own forum. Please repost your question to: http://social.technet.microsoft.com/Forums/en-US/Forefrontedgegeneral/threads Paul Adare MVP - Forefront Identity Manager http://www.identit.ca Creativity is great, but plagiarism is faster!

On Fri, 28 Sep 2012 17:48:09 +0000, G S Birdi wrote: We have two Win 2003 Servers (physical) running ISA 2006 SP1 ISA and TMG have their own forum. Please repost your question to: http://social.technet.microsoft.com/Forums/en-US/Forefrontedgegeneral/threads Paul Adare MVP - Forefront Identity Manager http://www.identit.ca Creativity is great, but plagiarism is faster!

Thank You Paul