Route all traffic doesn't work

Question

I wanna to route all traffic by DNS. It worked before by following these commands ,but it doesn't work today for unknown reasons.

Before connecting to iodine:

# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         edimax.com      0.0.0.0         UG    0      0        0 wlan0
link-local      *               255.255.0.0     U     1000   0        0 wlan0
192.168.2.0     *               255.255.255.0   U     2      0        0 wlan0

After connecting:

# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         edimax.com      0.0.0.0         UG    0      0        0 wlan0
10.0.0.0        *               255.255.255.224 U     0      0        0 dns0
link-local      *               255.255.0.0     U     1000   0        0 wlan0
192.168.2.0     *               255.255.255.0   U     2      0        0 wlan0

Command to route data over DNS tunnel:

#!/bin/bash
sudo route del default gw 192.168.2.1 wlan0
sudo route add default gw 10.0.0.1 dns0
sudo route add -net 209.54.48.51 netmask 255.255.255.255 gw 192.168.2.1 wlan0