The Columbia COD CA was set up in August 2000, using an Ultra 60 with a server written in C on top of SSLeay and some libraries developed in-house. This server communicates with our auth/authz broker, talking all requests through the broker which validates user identity first.
The server, 'COD', takes requests over HTTP on a non-standard port. For more information about COD, please see... (a document that will be ready soon.)