The type of proxy service: 'server(1)' or 'client(2)'.
When servicing a 'server' type proxy service, the proxy
device acts as a SSL server. It terminates the SSL
handshake initiated by a SSL client, and forwards the
data sent from the client to the destination.
When servicing a 'client' type proxy service, the proxy
device acts as a SSL client. It initiates a SSL
handshake to a SSL server, and forwards data sent from
one or more data sources to the SSL server.