1.TP 2[\fB!\fP] \fB\-\-source\-port\fP,\fB\-\-sport\fP \fIport\fP[\fB:\fP\fIport\fP] 3.TP 4[\fB!\fP] \fB\-\-destination\-port\fP,\fB\-\-dport\fP \fIport\fP[\fB:\fP\fIport\fP] 5.TP 6[\fB!\fP] \fB\-\-chunk\-types\fP {\fBall\fP|\fBany\fP|\fBonly\fP} \fIchunktype\fP[\fB:\fP\fIflags\fP] [...] 7The flag letter in upper case indicates that the flag is to match if set, 8in the lower case indicates to match if unset. 9 10Chunk types: DATA INIT INIT_ACK SACK HEARTBEAT HEARTBEAT_ACK ABORT SHUTDOWN SHUTDOWN_ACK ERROR COOKIE_ECHO COOKIE_ACK ECN_ECNE ECN_CWR SHUTDOWN_COMPLETE ASCONF ASCONF_ACK FORWARD_TSN 11 12chunk type available flags 13.br 14DATA I U B E i u b e 15.br 16ABORT T t 17.br 18SHUTDOWN_COMPLETE T t 19 20(lowercase means flag should be "off", uppercase means "on") 21.P 22Examples: 23 24iptables \-A INPUT \-p sctp \-\-dport 80 \-j DROP 25 26iptables \-A INPUT \-p sctp \-\-chunk\-types any DATA,INIT \-j DROP 27 28iptables \-A INPUT \-p sctp \-\-chunk\-types any DATA:Be \-j ACCEPT 29