Android - DroidWall and Wireless Tethering

As of version 1.2.5, tethering has been included in AFWall+, you should only need to enable

• (Tethering) - DHCP+DNS services

I had the same problem with wifi tethering after I installed Droidwall. Though the wifi connection was successful but I got no internet access.

I got it working simply by adding the DNS in my laptop. Hope, it works for you or anyone facing the same problem.

Change/Add DNS 4.2.2.2 and 8.8.8.8 in your PC/Laptop. That's it.

It is normal to disable Droidwall, for the reason that it blocks any incoming packets for port 67, to allow Wifi Tethering to work. Or quite simply, allow a custom script that matches the port number 67 which is dhcp to pass through.

FYI about Droidwall - the functionality and development efforts have been discontinued and the author sold it off to Avast.

The fork of Droidwall is called AFWall+ which can be found here and found on Google Play which is apparently better than the old Droidwall.

Edit

Since Wifi-Tether operates on both TCP/UDP's port number 67 (for dhcp to work), here's the rules necessary:

$IPTABLES -A "droidwall-wifi" -p TCP --destination-port 67 -j RETURN
$IPTABLES -A "droidwall-wifi" -p UDP --destination-port 67 -j RETURN

This rule here enables adbWireless to work with DroidWall enabled.

$IPTABLES -A "droidwall-wifi" --destination "0.0.0.0" --destination-port 5555 -j RETURN

You also have to enable Wi-Fi access for "Apps running as root" for this to work.