To view what an EdgeOS option does, such as "firewall all-ping enable", cat the coresponding node.def file.

EdgeOS_node.def

root@ubnt:~# cd /opt/vyatta/share/vyatta-cfg/templates/firewall/all-ping
root@ubnt:/opt/vyatta/share/vyatta-cfg/templates/firewall/all-ping# cat node.def

# icmp_echo_ignore_all 
# default value - 0
# If set non-zero, then kernel will ignore all ICMP ECHO requests sent to it

type: txt

help: Policy for handling of all IPv4 ICMP echo requests

val_help: disable; Disable processing of all IPv4 ICMP echo requests
val_help: enable; Enable processing of all IPv4 ICMP echo requests

default: "enable"

syntax:expression: $VAR(@) in "enable", "disable"; "all-ping must be enable or disable"

update:
	if [ x$VAR(@) == xdisable ]; then
	    sudo sh -c "echo 1 > \
	    	 /proc/sys/net/ipv4/icmp_echo_ignore_all"
        else
	    sudo sh -c "echo 0 > \
	    	 /proc/sys/net/ipv4/icmp_echo_ignore_all"
	fi

delete:
	sudo sh -c "echo 0 > \
	     /proc/sys/net/ipv4/icmp_echo_ignore_all"