Sniffing is a technique that can become dangerous if used for malicious purposes. In this case, it becomes a computer crime. In this article, we analyze what sniffing is, how to recognize it, and how to defend against this type of attack.
By sniffer, we mean the interception and control of data traveling on the network.
A sniffer is a software used to analyze network traffic, detect problems and keep the system efficient.
Local Network Sniffing
By sniffing information technology and telecommunications, the passive interception of data transiting in a telematic network is defined: it can be carried out for legitimate purposes and for illegal purposes against computer security.
The Types Of Sniffing
Sniffers come in various forms, and there are various types:
- the packet sniffers
- the Wi-Fi sniffers
- network sniffers
- IP sniffers.
Network Sniffer Software
All of these types of sniffers have one thing in common, though: A sniffer records all traffic to and from a networked computer.
As you can imagine, if this technique is used without consent and for malicious purposes, the person who carries it out can intercept all the data that passes on the controlled network.
Computer Crime Sniffing
A sniffer is a software commonly used to monitor network traffic to detect problems and keep the system running. However, as described above, sniffers can also be used for illegal purposes by recording everything they encounter on the network, including usernames and unencrypted passwords. Cybercriminals can exploit them to access any account.
Sniffers can be installed on any computer connected to a local network to be scanned.
Sniffing Attack: Purpose
Generally, sniffers used for illegal purposes by cybercriminals are used to steal data, spy on network activity, and gather information about users.
The ultimate goal of their use is to obtain passwords and current account information for use in banking and shopping sites.
They are often placed in places that offer unsecured Wi-Fi connections, such as cafes, hotels, airports, etc………….
The sniffer is also used to impersonate other devices on the network (in technical jargon, it is called a spoofing attack) to steal sensitive information.
How Can We Protect Ourselves From A Sniffer?
Install good antivirus software that prevents malware from entering the system and detects anything that shouldn’t be on a computer, like a sniffer.
I recommend AVG Antivirus Free or Sophos, which offer you all the protection you need and help you remove and prevent malware.
Public Wi-Fi networks
If you can, avoid all open Wi-Fi networks, such as those available in airports, bars, hotels, etc …
When we have talked about social engineering, cybercriminals use phishing emails that contain fake websites and trick victims into unknowingly downloading sniffers.
Try to check when you browse the web that the sites have an HTTPS protocol. Look at the address bar for a website, and it indicates HTTP or HTTPS; the secure one is the HTTPS protocol.
VPN is a virtual private network that encrypts the connection and hides all data sent from the computer over the Internet; we have already talked about VPN in some previous articles.