--- /dev/null
+.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--chunk-types\fP {\fBall\fP|\fBany\fP|\fBonly\fP} \fIchunktype\fP[\fB:\fP\fIflags\fP] [...]
+The flag letter in upper case indicates that the flag is to match if set,
+in the lower case indicates to match if unset.
+
+Chunk 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
+
+chunk type available flags
+.br
+DATA U B E u b e
+.br
+ABORT T t
+.br
+SHUTDOWN_COMPLETE T t
+
+(lowercase means flag should be "off", uppercase means "on")
+.P
+Examples:
+
+iptables -A INPUT -p sctp --dport 80 -j DROP
+
+iptables -A INPUT -p sctp --chunk-types any DATA,INIT -j DROP
+
+iptables -A INPUT -p sctp --chunk-types any DATA:Be -j ACCEPT