Fixed zerotier

Fixed Different gateway not accessible problem

package/lean/luci-app-zerotier/root/etc/zerotier.start

@@ -22,6 +22,8 @@ if [ $nat_enable -eq 1 ]; then
   iptables -I FORWARD -i $zt0 -j ACCEPT
   iptables -I FORWARD -o $zt0 -j ACCEPT
   iptables -t nat -I POSTROUTING -o $zt0 -j MASQUERADE
+  ip_segment=$(ip route | grep "dev $zt0 proto" | awk '{print $1}')
+  iptables -t nat -I POSTROUTING -s $ip_segment -j MASQUERADE
 fi
 
 fi

package/lean/luci-app-zerotier/root/etc/zerotier.stop

@@ -8,3 +8,5 @@ echo "zt interface $zt0 is stopped!"
 iptables -D FORWARD -i $zt0 -j ACCEPT 2>/dev/null
 iptables -D FORWARD -o $zt0 -j ACCEPT 2>/dev/null
 iptables -t nat -D POSTROUTING -o $zt0 -j MASQUERADE 2>/dev/null
+ip_segment=$(ip route | grep "dev $zt0 proto" | awk '{print $1}')
+iptables -t nat -D POSTROUTING -s $ip_segment -j MASQUERADE 2>/dev/null