export FW_ICMP4_TYPES=$(
iptables -p icmp -h 2>/dev/null | \
sed -n -e '/^Valid ICMP Types:/ {
- n; :r;
- /router-advertisement/d;
- /router-solicitation/d;
- s/[()]/ /g; s/[[:space:]]\+/\n/g; p; n; b r
+ n; :r; s/[()]/ /g; s/[[:space:]]\+/\n/g; p; n; b r
}' | sort -u
)