| DSR Direct Routing Loopback Adapters in Windows Server 2008 |
| Written by Ben McInturff |
| Thursday, 25 June 2009 21:59 |
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Recently I ran across an interesting networking issue when using a DSR load balancing setup when converting from Windows Server 2003 to Windows Server 2008. It seems that microsoft has changed the way that the TCP/IP stack functions, so that when we went to configure the loopback adapters and setup IIS to run our websites, the server was unreachable. Worse it had a negative effect on routing to our production servers, since the server in question runs as an auxillary server for the production sites. Anyhow, we finally found a great article that chronicles the issues, and how to correct them. It all boils down to a couple of commands on the command line to correct it: netsh interface ipv4 set interface "net" weakhostreceive=enabled netsh interface ipv4 set interface "loopback" weakhostreceive=enabled netsh interface ipv4 set interface "loopback" weakhostsend=enabled You can read the full article here: http://blog.loadbalancer.org/direct-server-return-on-windows-2008-using-loopback-adpter/ |