| A packet
sniffer is a utility
that has been used since the original release
of Ethernet.
Packet sniffing allows individuals to capture
data as
it is transmitted over a network.
Packet sniffer programs are commonly used by network professionals
to help diagnose network issues and are also used by malicious users
to capture unencrypted data like passwords
and usernames
in network traffic. Once this information is captured, the user
can then gain access to the system
and/or network. If you wish to keep information confidential or are concerned
about packet sniffing, it is advised that you work on encrypted
protocols
and encrypt
all sensitive data, such as e-mails,
being sent over the Internet
and/or network. A great encryption
program is PGP,
users who are using Telnet
should consider using SSH
instead.
Also see: Network definitions,
Promiscuous mode,
Security definitions
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