AppHarbor is a blog and website that provides various services and products related to PaaS hosting, including MSSQL/MySQL add-ons. However, there is some unfortunate news as the website will be shutting down after being in business for almost 12 years. All services and products, including the main PaaS hosting product and add-ons, will be terminated on December 5th. Customers will need to migrate to other service providers to avoid downtime and data loss. While this process may be relatively straightforward for many customers, those with larger and more complex apps may require assistance. The website has recently undergone a major upgrade to support Windows Server 2012 R2, IIS 8.5, and .NET 4.5.2. This upgrade was carefully planned to ensure compatibility with running applications. The website now also supports WebSocket connections and has implemented CPU throttling changes to improve concurrency and stability. Additionally, the website has taken prompt action to address the "Heartbleed" vulnerability by updating affected components with secure versions of OpenSSL, re-issuing SSL certificates, resetting credentials and passwords, and implementing session cookie validation and perfect forward secrecy. Customers are advised to reset passwords, review activity history, revoke authorizations for external applications, and recreate/install custom SSL certificates for extra caution. The website provides detailed instructions on how to take these precautionary steps. Overall, AppHarbor offers PaaS hosting services and add-ons that have served the .NET community for many years, but customers should be aware of the upcoming shutdown and take necessary steps to migrate to other service providers.