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We are having some weird issues on a brand new Windows SBS network and I'd appreciate any ideas of where to look. The physical subnets have been separated with an internal m0n0wall. This was done as per the recommendation of a regulatory compliance consultant to our client. Here's a network diagram: http://www.rtpcomputer.com/uploads/Network%20Diagram.htm The primary symptom that we're experiencing is that the clients are going offline randomly and frequently. It seems to happen more often if you are accessing a share on the server. Offline Files and Folders are enabled on the My Documents folder which has been redirected to the server. I can synchronize and go online and then a few seconds or a few minutes later, it can knock me offline again. This can happen even while a large Internet download is occurring and the http traffic will have no problems. It also doesn't create problems with the connections between Exchange and Outlook which are configured to use RPC/HTTPS. The client NICs are reporting no errors and no collisions. The m0n0wall is reporting no errors in its logs and no collisions on all of its NICs. The event logs are clean on the clients and the server. There are no ISA alerts and Live Logging shows no traffic from the Internal network is being denied. So far, here is what I have done: - Added the server's LAN adapter to the Internal Network. This resulted in the Internal network having the following IP addresses: 192.168.110.0 - 192.168.110.255 192.168.110.0 - 192.168.111.255 192.168.226.0 - 192.168.226.255 - Added the following persistent routes on the server: Network Address Netmask Gateway Address Metric 192.168.111.0 255.255.255.0 192.168.110.1 20 192.168.226.0 255.255.255.0 192.168.110.1 20 - Turned on EnablePMTUPathDiscovery at the server and rebooted the server - Turned off ISA connection limits Right now, here's where my thinking is headed: - I'm thinking of installing the 898060 and 899148 hotfixes and then enabling Server2003NegotiateDisable. - I'm also thinking of disabling strict RPC compliance in ISA. - I'm also wondering if enabling Autodisconnect on the server will help. As you can see, all I can see is the symptom - I don't yet know what the actual problem is so I'm entertaining all kinds of solutions. Has anyone heard of this symptom before? Do you have any recommendations? Is there anything in the m0n0wall that I can set to help me diagnose or fix this problem? Thanks, -- Michael Pope RTP Computer Services, Inc. "Making Today's Technology Work For You" http://www.rtpcomputer.com/ |