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Wireshark Tutorial: Network & Passwords Sniffer Computers communicate using networks. These networks could be on a local area network LAN or exposed to the internet. Network Sniffers are programs that capture low-level package data that is transmitted over a network. An attacker can analyze this information to discover valuable information such as user ids and passwords. In this article, we will introduce you to common network sniffing techniques and tools used to sniff networks. We will also look at countermeasures that you can put in place to protect sensitive information been transmitted over a network. What is network sniffing? Computers communicate by broadcasting messages on a network using IP addresses. Once a message has been sent on a network, the recipient computer with the matching IP address responds with its MAC address. Network sniffing is the process of intercepting data packets sent over a network.This can be done by the specialized software program or hardware equipment. Sniffing can be used to; Capture sensitive data such as login credentials Eavesdrop on chat messages Capture files have been transmitted over a network The following are protocols that are vulnerable to sniffing Telnet Rlogin HTTP SMTP NNTP POP FTP IMAP

 Wireshark Tutorial: Network & Passwords Sniffer

Computers communicate using networks. These networks could be on a local area network LAN or exposed to the internet. Network Sniffers are programs that capture low-level package data that is transmitted over a network. An attacker can analyze this information to discover valuable information such as user ids and passwords.

In this article, we will introduce you to common network sniffing techniques and tools used to sniff networks. We will also look at countermeasures that you can put in place to protect sensitive information been transmitted over a network.

What is network sniffing?

Computers communicate by broadcasting messages on a network using IP addresses. Once a message has been sent on a network, the recipient computer with the matching IP address responds with its MAC address.

Network sniffing is the process of intercepting data packets sent over a network.This can be done by the specialized software program or hardware equipment. Sniffing can be used to;

• Capture sensitive data such as login credentials
• Eavesdrop on chat messages
• Capture files have been transmitted over a network

The following are protocols that are vulnerable to sniffing

• Telnet
• Rlogin
• HTTP
• SMTP
• NNTP
• POP
• FTP
• IMAP