Secure your Wi-Fi: Measures and countermeasures for everyone

Wireless networks (Wi-Fi) make it easy to access the internet from the computer, the , tablets and other wireless devices anywhere in the house without the need for cables.
With traditional wired networks, it is extremely difficult to steal some internet connections, but the problem is with wireless signals as they can be intercepted by a neighboring building or by a car parked outside your apartment.Wi-Fi

This practice, also known as piggybacking, can be detrimental for three reasons:

It will increase your monthly Internet bill especially when you pay byte for data transfer.
It will slow down your access to αφού θα μοιράζεστε την ίδια σύνδεση με άλλους .
It can create security risks as you may lose files on your computers, or find your IP in the Electronic Crime Proofs for an attack you have not done.

  • The malicious scenario: There have been several cases where innocent users have been arrested for sending emails from hacked email accounts through compromised wireless Wi-Fi networks they used at home. The Wireshark is a free Internet sniffing tool for Linux, Mac and Windows that can detect traffic streaming through a wireless network, including cookies, forms and other HTTP requests.

Wireless Wi-Fi Measures and Countermeasures

So below we will see how you can make your wireless network secure. We will see the security measures you need to take, but also the countermeasures used by , to breach your network.

With regard to countermeasures now, there is plenty. We will only mention a few, what we consider to be the main one.

Change the router settings

You should know how to access your wireless router settings through your browser. You can usually do this by typing the internal IP address “” into your browser. You will then need to enter the correct username and password to view it settings. The names and passwords are different for each router, so you should check your router's user manual first.

You can also use Google to find the manuals for most online routers in case you lose the printed manual that came with your device.

Alternatively, you can use the portable application (no installation required) Router Default Passwords that will display everything you need on your screen.

The application works only on Windows. If you still can not find IP to log in, open the following list:

Router Default IPs
Apple Lossless Audio CODEC (ALAC),
Amped Wireless
Card King
SMC Networks
US Robotics


If you are looking for the default passwords for the web page settings page Router reset and will cover you.

Create a unique password for your router

Once you log in, the first thing you need to do to secure your network is to change your default password. Once you have found it, others can find it.

This will prevent others from accessing and you can maintain the security settings you want. You can change the password from the management settings on the router's configuration page. The default values ​​are usually admin / password.

  • The malicious scenario: There are many public databases that contain default usernames and passwords for wireless routers, modems, and other networking equipment. So anyone can find the factory settings of your router from such a database. If it is connected to the same Wi-Fi, it can be connected to one of the internal IPs mentioned above. The router page tells you the manufacturer… and so without delay it can find the default username-password.

Change your network SSID

The SSID (or wireless network name) of your wireless router is usually set as a "default" by the manufacturer, or by your line provider (eg CYTA5BFV, or Fortnet-*). THE of the SSID name will not make your network more secure, especially using your name, home address or other personal information as a network name. From time to time I have come across SSIDs that are mobile numbers, first names, etc.

  • The malicious scenario: Wi-Fi scanning tools like inSSIDer (Windows) and Kismet (Mac, Linux) are free and allow anyone who wants to find all available wireless networks in an area even if the routers do not transmit their SSID name.

Enable network encryption

To prevent other computers in the area from using an Internet connection, you need to encrypt the wireless signals.

There are several encryption methods for wireless settings, such as: WEP, (WPA-Personal) and WPA2 (Wi-Fi Access version 2).

WEP is a very basic encryption and is thus less secure (it can be easily broken, but it is compatible with most devices.) WPA2 encryption is safer but only compatible with 2006-built hardware.

To enable encryption on your wireless network, open security settings what? wireless function on your royter configuration page. From there, you can usually choose which security method you want to use. Of course, if your equipment is not old, use WPA2. Choose a hard password using a combination of letters, numbers, and special characters.

  • The malicious scenario: οι εφαρμογές AirCrack και coWPAtty είναι μερικά δωρεάν εργαλεία που επιτρέπουν ακόμα και στους μη hackers να σπάσουν την κρυπτογράφηση WEP / WPA (PSK) χρησιμοποιώντας κάποιο λεξικό ή τεχνικές brute . Ένα βίντεο στο YouTube δείχνει ότι το AirCrack μπορεί να χρησιμοποιηθεί και για να σπάσει την κρυπτογράφηση του WiFi μέσω jailbraked iPhone.

Watch the video

Filter MAC addresses

All your wireless devices have a unique MAC address (it has nothing to do with Apple's Macs). Imagine the MAC address as the unique IP address each computer that is connected to the Internet.

As an additional means of protection, you can add the MAC addresses of all the devices you use to your wireless router settings. This allows only certain devices to connect to the Wi-Fi network.

MAC addresses are encoded in networking equipment. Unfortunately, tampering with a MAC address is possible, but the attacker should first know one of the MAC addresses of computers that are connected to your wireless network before attempting to forge.

To enable MAC address filtering, first create a list of all the devices you want to connect to your wireless network. Find their MAC addresses, and then add them to the MAC address filters in your router settings.

Για να βρείτε την διεύθυνση MAC στους υπολογιστές σας ανοίξτε το and type the following command:

ipconfig / all

The command will display your MAC address next to the name "Physical Address". You can find the MAC addresses of the cordless cell phones and other portable devices used in the network settings.

  • The malicious scenario: One can change the MAC address of his computer and can easily connect to your network, since your network allows you to connect from devices that have that particular MAC address. Anyone can identify your device's MAC address wirelessly using a sniffing tool like Nmap, and then change its MAC address using another free tool such as MAC Shift.

Reduce the range of the wireless signal

If your wireless router has a long range but your apartment is small, it would be advisable to reduce the signal bandwidth either by changing your router's function to 802.11g (instead of 802.11n or 802.11b) or by using a different wireless channel.

You can also try placing the router under the bed to limit the direction of the signals somewhat.

Alternatively, let us mention Paint Anti-Wi-Fi: Researchers have developed a special color that prevents Wi-Fi and can help you stop neighbors from accessing your home network without having to set anything on your router. The color contains chemicals that block radio signals by absorbing them.

"With the entire room covered, Wi-Fi signals cannot enter and cannot leave."

Upgrade your router's firmware

You should occasionally check the manufacturer's page to make sure your router is running with the latest firmware that is being released.

Connect to your secure wireless Wi-Fi network

To complete, MAC address filtering along with WPA2 encryption (AES) and a very complex password is probably the best way to secure your wireless network.

Once you've enabled the above security settings on your wireless router, you must add the new settings to your computers or other wireless devices that you can use to connect to your secure Wi-Fi. You can choose to automatically connect to the network without having to type the password each time.

Who is connected to your wireless network

If you are concerned that a stranger is connected to your wireless network, try AirSnare. It is a free utility that will look for unexpected MAC addresses on your wireless network as well as DHCP requests.

Another option is to open your router's management page (using 192.168. *) And look for the DHCP Clients Table. From there, you'll see a list of all the computers and wireless devices that are connected to your home network.

in addition to

Turn off your router completely when you are not planning to use the computer for a long time. You will save energy and the door will be closed 100% for piggybackers.

To allow a new device to be connected to your network, you need to find the device's MAC address and add it to your router. So if a friend wants to connect, you can give him access. Remove its MAC address from your router settings after disconnecting it. The Best Technology Site in Greecefgns

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Written by giorgos

George still wonders what he's doing here ...


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  1. I'm looking for a technician as my wifi has been dropped but hard for Greece, can you recommend me someone? I have been approached by the police

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