We want to use multiple OCSP servers,
but the way I see it we can specify only one OCSP server in the
configuration file. Is there any other way to do this?
Do you mean that you have a cluster of OCSP servers, and you want to
distribute requests among them for increased redundancy or
performance?
The current architecture of OCSP in stunnel only supports a single
OCSP server. Please contact me if you want to sponsor redesigning
stunnel to support connecting a list of OCSP servers instead. A
similar functionality is currently implemented for the "connect"
option.
Alternatively, the license of stunnel allows you to implement this
feature by yourself.