Well, (acceptor-address *acceptor*) returns nil if it has been started with no :address initarg. The acceptor-address returns the :address argument at the initialization of the acceptor which designates on which ip or hostname the server listens (if :address is not supplied server listens on all the interfaces), not on which ip address a request came through.
Example:
I have 2 interfaces on my machine: eth0 (192.168.1.1) and eth1 (8.8.8.8) . If I start an acceptor with no address supplied, hunchentoot receives requests on both of these interfaces and (acceptor-address *acceptor*) returns nil which implies that it listens on 0.0.0.0 .But each request has to come through one of them. How can I find on which one a request came through?