.IP "\fBpssl:\fIport\fR[\fB:\fIip\fR]"
Listen on the given SSL \fIport\fR for a connection. By default,
-\fB\*(PN\fR listens for connections to any local IP address, but
+connections are not bound to a particular local IP address and
+it listens only on IPv4 (but not IPv6) addresses, but
specifying \fIip\fR limits connections to those from the given
-\fIip\fR. The \fB\-\-private\-key\fR, \fB\-\-certificate\fR, and
-\fB\-\-ca\-cert\fR options are mandatory when this form is used.
+\fIip\fR, either IPv4 or IPv6 address. If \fIip\fR is
+an IPv6 address, then wrap \fIip\fR with square brackets, e.g.:
+\fBpssl:6632:[::1]\fR. The \fB\-\-private\-key\fR,
+\fB\-\-certificate\fR, and \fB\-\-ca\-cert\fR options are mandatory
+when this form is used.
.
.IP "\fBptcp:\fIport\fR[\fB:\fIip\fR]"
Listen on the given TCP \fIport\fR for a connection. By default,
-\fB\*(PN\fR listens for connections to any local IP address, but
+connections are not bound to a particular local IP address and
+it listens only on IPv4 (but not IPv6) addresses, but
\fIip\fR may be specified to listen only for connections to the given
-\fIip\fR.
+\fIip\fR, either IPv4 or IPv6 address. If \fIip\fR is
+an IPv6 address, then wrap \fIip\fR with square brackets, e.g.:
+\fBptcp:6632:[::1]\fR.
.
.IP "\fBpunix:\fIfile\fR"
Listen on the Unix domain server socket named \fIfile\fR for a