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.
.
.IP "\fBptcp:\fIport\fR[\fB:\fIip\fR]"
Listen on the given TCP \fIport\fR for a connection. By default,
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.
.
.IP "\fBptcp:\fIport\fR[\fB:\fIip\fR]"
Listen on the given TCP \fIport\fR for a connection. By default,