sudo iptables -t filter -X udp_out > /dev/null 2>&1
sudo iptables -t filter -X udp_in > /dev/null 2>&1
sudo iptables -t filter -F OUTPUT > /dev/null 2>&1
+sudo iptables -t filter -F INPUT > /dev/null 2>&1
# add iptables rule
sudo iptables -t filter -N udp_out
sudo iptables -t filter -N udp_in
-sudo iptables -t filter -A OUTPUT -p udp -o eth0 -j udp_out
+sudo iptables -t filter -A OUTPUT -p udp -o br0 -j udp_out
sudo iptables -t filter -A udp_out -j ACCEPT
-sudo iptables -t filter -A INPUT -p udp -i eth0 -j udp_in
+sudo iptables -t filter -A INPUT -p udp -i br0 -j udp_in
sudo iptables -t filter -A udp_in -j ACCEPT
timer_callback &