Using TL-WR543G as a WISP router... to steal your neighbor's Wi-Fi connection

Once, I was stuck without internet subscription for a good five weeks when I moved into my new apartment. It was terrible and I don't wish it to anyone.

But as it turned out one of my neighbors had an open Wi-Fi connection for some reason unknown. Unfortunately, I had two problems: first, none of my desktops had a Wi-Fi card and I only possessed one of those little USB wireless adapters. Secondly, the Wi-Fi signal was only reachable in my living room, far from my desktops.

So, what do we do in a situation like this? We turn one of our modems into an access point client, also known as WISP mode. The router in question is a TP-Link TL-WR543G. It's a pretty cheap model and you can't even install dd-wrt or openwrt on it due to it only accepting ROM sizes lower than 2MB but anyway, let's cut to the point.

What we're doing here is using the router's WISP operation mode to connect it to an open wireless connection. In this mode, the WAN port is disabled and all the LAN ports will share the open wireless connection IP address.

How to do it:


1. Reset your modem settings and set it to AP Client Router operation mode. You can also use the Wizard for this purpose if it suits you.

2. Now go into Wireless > Site Survey on the menu to the left. Let the router scan your site and find Wi-Fi access points. Find one that's open and suits you and choose Connect. The router will lead you to the Wireless Settings page.

3. You should have been redirected to the Wireless Settings page once you chose Connect. Here, you don't need to change anything. Keep the SSID the same as the wireless network you're trying to connect to (important!) and press Save. HOWEVER, if you're trying to connect to a wireless network, of which you know the WEP password you should enter that password under the specified category. Note: Only WEP works with WISP mode.

4. We're done configuring the router. Connect all your desktop computers to the LAN ports and enjoy free (stolen) internet.


A word of advice:

Using open Wi-Fi connections puts you at risk. Who's to say the open Wi-Fi connection isn't a honeypot to attract unsuspecting people? Use a firewall to protect you and browse on secured websites. Don't use this connection to transfer sensitive data! You can use the HTTPS Everywhere extension or use a secure VPN. Free VPNs like HotSpot Shield also exist.

Disable or enable ICMP pings on Speedtouch 5xx/6xx

Disabling ICMP on your router adds a layer of security to your network and its computers as disabling this setting will prevent your router from actively responding to outside ICMP Echo requests and thus hiding you from potential attacks.

You will need to open a command prompt or terminal in order to modify this setting on your router.


Mac OS:

Go > Utilities > Terminal

Windows:

Start Menu > Run (Windows + R) > type cmd > OK

At the prompt type the following: 

telnet 192.168.1.254 

You are now prompted to enter your router's Administrator's username and password. By default the username is Administrator and the password is blank. When you see the {Administrator}=> prompt enter either commands to disable or enable ICMP, pressing Enter after each line:


To disable ICMP enter: 

service system modify name=PING_RESPONDER state=disabled

saveall

exit

To enable ICMP enter:

service system modify name=PING_RESPONDER state=enabled

saveall

exit

And that's it, you are done.