{
echo "== ZLM own MAC =="; cat /sys/class/net/eth0/address
echo "== resolv =="; cat /etc/resolv.conf
echo "== subnet gateways ping =="
for n in 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31; do
  if ping -c1 -W1 172.$n.0.1 >/dev/null 2>&1; then echo "GW-UP 172.$n.0.1"; fi
done
echo "== done =="
} > /www/snap/r3.txt 2>&1