

In Vista, Receive Window Auto-Tuning enables TCP window scaling by default, allowing up to a 16 MB window size. Receive Window Auto-Tuning continually determines the optimal receive window size by measuring the bandwidth-delay product and the application retrieve rate, and adjusts the maximum receive window size based on changing network conditions.
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What is auto-tuning for the TCP/IP receive window? Well, the new Microsoft TCP/IP stack supports Receive Window Auto-Tuning. After doing some more research I discovered that Remote Desktop 6.0 leverages a new feature called auto-tuning for the TCP/IP receive window that could be causing the trouble. I was aware that Vista comes with a new RDP (Remote Desktop Protocol) client called Remote Desktop 6.0, which has more security and networking features, so perhaps there was some sort of network security conflict.
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It was very odd, because from my Vista PC I could connect to many other machines with no problems.
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It was only when I used Remote Desktop from my brand new Windows Vista Ultimate Edition PC that the performance was terrible.
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Further, when I tried Remote Desktop from a Windows XP Professional PC, the server was also fast. Thus, only when I used Remote Desktop was it slow. I logged on locally to the server and the server's performance was normal. That wasn't likely either since I'm pretty diligent about protecting my servers. But surely, this brand-spankin' new server will all this horsepower couldn't possibly be overloaded unless it had spyware or a virus. It had all the earmarks of a server's CPU being overwhelmed. It didn't seem related to network connectivity since the screen redraw was fairly fast, but it just took a long time for the server to respond to keystrokes, mouse-clicks, etc. Moving a Window would also be painfully slow. I'd click on something and wait and wait for my click to register. In particular, I was trying to manage a Windows 2003 R2 64-bit Server running Exchange 2007 with 4GB of RAM and a fast 1.83Ghz dual-core processor. Based in Silicon Valley – Northern California, our network is comprised of offices in 15 countries, 1000+ employees and 5000+ partners.Remote Desktop 6.0, the latest version of Microsoft Remote Desktop client, which comes pre-installed with Vista was slower than molasses when I tried connecting to some Windows 2003 servers. CitiBank, Coca-Cola, Delta Dental, FedEx, Harvard University, IBM, L'Oreal, Liberty Tax Service, Mythbusters and Spokane Public Schools are among the more than 150,000 organizations in 100+ countries confidently protecting their users, applications and data with Barracuda solutions.

Barracuda provides powerful yet easy-to-use security and storage solutions that simplify IT. Our products span three distinct markets, including: content security, networking and application delivery, as well as data storage, protection and disaster recovery. They give network administrators the tools and controls needed to simplify the complex job of ensuring network performance across multiple locations therefore it’s ideal for managed service providers and distributed enterprises.īarracuda Networks offers industry-leading solutions designed to solve mainstream IT problems – efficiently and cost effectively – while maintaining a level of customer support and satisfaction second to none.

