libxt_dccp.man

.TP
[\fB!\fP] \fB\-\-source\-port\fP,\fB\-\-sport\fP \fIport\fP[\fB:\fP\fIport\fP]
.TP
[\fB!\fP] \fB\-\-destination\-port\fP,\fB\-\-dport\fP \fIport\fP[\fB:\fP\fIport\fP]
.TP
[\fB!\fP] \fB\-\-dccp\-types\fP \fImask\fP
Match when the DCCP packet type is one of 'mask'. 'mask' is a comma-separated
list of packet types.  Packet types are: 
.BR "REQUEST RESPONSE DATA ACK DATAACK CLOSEREQ CLOSE RESET SYNC SYNCACK INVALID" .
.TP
[\fB!\fP] \fB\-\-dccp\-option\fP \fInumber\fP
Match if DCCP option set.