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Monitor mode, or RFMON (Radio Frequency MONitor) mode, allows a computer with a wireless network interface controller (WNIC) to monitor all traffic received on a wireless channel. Unlike promiscuous mode , which is also used for packet sniffing , monitor mode allows packets to be captured without having to associate with an access point or ad ...
A non-routing node in promiscuous mode can generally only monitor traffic to and from other nodes within the same collision domain (for Ethernet and IEEE 802.11) or ring (for Token Ring). Computers attached to the same Ethernet hub satisfy this requirement, which is why network switches are used to combat malicious use of promiscuous mode. A ...
Screenshot of Wireshark network protocol analyzer A packet analyzer (also packet sniffer or network analyzer) is a computer program or computer hardware such as a packet capture appliance that can analyze and log traffic that passes over a computer network or part of a network. Packet capture is the process of intercepting and logging traffic. As data streams flow across the network, the ...
This tapping method consists in enabling promiscuous mode on the device that is used for the monitoring and attaching it to a network hub. This works well with older LAN technologies such as 10BASE2, FDDI, and Token Ring. On such networks, any host can automatically see what all other hosts were doing by enabling promiscuous mode.
To collect data on this layer, the network interface card (NIC) of a host can be put into "promiscuous mode". In so doing, all traffic will be passed to the CPU, not only the traffic meant for the host. However, if an intruder or attacker is aware that his connection might be eavesdropped, he might use encryption to secure his connection.
This type of promiscuous traffic, due to a lack of address filtering, has been a recurring issue with certain Unix and Linux kernels, [2] [3] but has never been reported on Microsoft Windows operating systems post Windows XP. Another form of promiscuous traffic occurs when two different applications happen to listen on the same group address.
CommView puts the network adapter into promiscuous mode and captures network traffic. [3] It also supports capturing packets from dial-up and virtual adapters (e.g. ADSL or 3G modems), as well as capturing loopback traffic. Captured traffic is then analyzed and the application displays network statistics and individual packets.
Because SNMP is designed to allow administrators to monitor and configure network devices remotely it can also be used to penetrate a network. A significant number of software tools can scan the entire network using SNMP, therefore mistakes in the configuration of the read-write mode can make a network susceptible to attacks. [27]: 52