are supported:
.RS
-.TP
-\fBssl:\fIhost\fR[\fB:\fIport\fR]
-The specified SSL \fIport\fR (default: 6633) on the given remote
-\fIhost\fR. The \fB--private-key\fR, \fB--certificate\fR, and
-\fB--ca-cert\fR options are mandatory when this form is used.
+.IP "\fBssl:\fIip\fR[\fB:\fIport\fR]"
+The specified SSL \fIport\fR (default: 6633) on the host at the given
+\fIip\fR, which must be expressed as an IP address (not a DNS name).
+The \fB--private-key\fR, \fB--certificate\fR, and \fB--ca-cert\fR
+options are mandatory when this form is used.
-.TP
-\fBtcp:\fIhost\fR[\fB:\fIport\fR]
-The specified TCP \fIport\fR (default: 6633) on the given remote
-\fIhost\fR.
+.IP "\fBtcp:\fIip\fR[\fB:\fIport\fR]"
+The specified TCP \fIport\fR (default: 6633) on the host at the given
+\fIip\fR, which must be expressed as an IP address (not a DNS name).
.TP
\fBunix:\fIfile\fR
.IP \fBmod_dl_dst\fB:\fImac\fR
Sets the destination Ethernet address to \fImac\fR.
+
+.IP \fBmod_nw_src\fB:\fIip\fR
+Sets the IPv4 source address to \fIip\fR.
+
+.IP \fBmod_nw_dst\fB:\fIip\fR
+Sets the IPv4 destination address to \fIip\fR.
+
+.IP \fBmod_tp_src\fB:\fIport\fR
+Sets the TCP or UDP source port to \fIport\fR.
+
+.IP \fBmod_tp_dst\fB:\fIport\fR
+Sets the TCP or UDP destination port to \fIport\fR.
.RE
.IP