one or more of the following OpenFlow connection methods:
.TP
-\fBpssl:\fR[\fIport\fR]
+\fBpssl:\fR[\fIport\fR][\fB:\fIip\fR]
Listens for SSL connections from remote OpenFlow switches on
\fIport\fR (default: 6633). The \fB--private-key\fR,
\fB--certificate\fR, and \fB--ca-cert\fR options are mandatory when
this form is used.
+By default, \fB\*(PN\fR listens for connections to any local IP
+address, but \fIip\fR may be specified to listen only for connections
+to the given \fIip\fR.
.TP
-\fBptcp:\fR[\fIport\fR]
+\fBptcp:\fR[\fIport\fR][\fB:\fIip\fR]
Listens for TCP connections from remote OpenFlow switches on
\fIport\fR (default: 6633).
+By default, \fB\*(PN\fR listens for connections to any local IP
+address, but \fIip\fR may be specified to listen only for connections
+to the given \fIip\fR.
.TP
\fBpunix:\fIfile\fR