1This extension is loaded if `--protocol icmp' is specified. It 2provides the following option: 3.TP 4.BR "--icmp-type " "[!] \fItypename\fP" 5This allows specification of the ICMP type, which can be a numeric 6ICMP type, or one of the ICMP type names shown by the command 7.nf 8 iptables -p icmp -h 9.fi 10