![]() ![]() Thats why it works out of the box.īack to our problem. So it actually uses a NAT relationship between the client and the server. Thus, TMG appears to perform NAT on the traffic between the client and server, because it creates sockets for its configured IP Addresses even if there is a route relationship between the networks. Because an application proxy mechanism such as the Web Proxy Filter creates a completely new connection between TMG and the published server, and because the default for Web Publishing rules is to “Use the ISA computer IP address” when creating these connection. The Web Listener used for Web publishing will always include the TMG Web Proxy Filter. You might wonder why does OWA even work in our scenario without implementing some special things? as you can see we used an Exchange Web Client Access rule. Its one of the TMG’s best kept secrets that you can actually use publishing rules when using a route relationship between networks. Normally you will allways use access rules if there is a route relationship between te networks and publishing rules if there is a NAT relationship. Instead I created an access rule between the Barracuda and the backend exchange 2003 server. If you read my articles about installing and configuring Forefront TMG Back to Back solutions ( here and here) you might have wondered why I did not configure a publishing rule that points to the backend exchange 2003 server. Now its listening again and we could RDP again….weird fix but it works for me. Goto the connection section and look at the properties of the RDP-tcp protocolĮnter listening on all adapters and close Start an MMC and add the RD session host configuration snap-in. Processing time: 0ms Original Client IP: 10.200.0.99 Number of bytes sent: 52 Number of bytes received: 40 ![]() Rule: Allow remote management from selected computers using Terminal Serverĭestination: Local Host (10.204.100.100:3389) Status: A connection was abortively closed after one of the peers sent an RST packet.(0x80074e21 FWX_E_ABORTIVE_SHUTDOWN) The firewall log shows:Ĭlosed Connection TMG-FE 23-11-2010 17:48:44 After we logged on to the console we did a netstat -ano | findstr “3389” but it show no results. After powering on we could not RDP into the server anymore. We powered down our server to add some extra memory to get some better performance. A weird thing happenend today with our TMG 2010 box. ![]()
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