Officially supported (Jaybird 2.2.x)

• Firebird 2.5.x
• Firebird 2.1.x
• Firebird 2.0.x
• Firebird 1.5.x (support will be dropped in Jaybird 2.3)
• Firebird 1.0.x (support will be dropped in Jaybird 2.3)

Jaybird 1.0.x and Jaybird 1.5.x work with the following InterBase servers, however they are officially not supported:

• Interbase 6.0.x
• Interbase 6.5 (only version available for trial download was tested)
• Interbase 7.1 (only version available for trial download was tested, service packs 1 and 2 were not available for public access at that time), no information about IB 7.5.

Jaybird 2.0.x and later will NOT work with any of the Interbase servers, since it uses a Firebird-specific constant during attachment to get specific information about the Firebird server (we have to distinguish between FB 1.5 and FB 2.0).