Can I use BotDetect ASP.NET CAPTCHA in a Web Farm / Web Garden?
Yes. Note that BotDetect CAPTCHA requires Session State persistence, so you will have to enable Session State for your web application. In a Web Farm / Web Garden scenario, this means either: • Configuring ASP.NET to use the SQL Server or .NET State Server modes of Session State persistence, and keeping the Session State for your whole Web Farm on one server. • Continue using InProc Session State on each individual server, which means you will have to ensure that clients return to the server containing their existing Session State data on all Http requests after the first one. This is known as enabling sticky connections. Please check your load-balancer settings. For more information on these topics, consult the following online resources: • http://www.hanselman.com/blog/Permalink.aspx?title=LoadBalancingAndASPNET • http://www.informit.com/articles/article.aspx?