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#Arpspoof how to disable mac

> os.system('echo 0 > /proc/sys/net/ipv4/ip_forward') # disable kernel IP forwarding > os.system('echo 1 > /proc/sys/net/ipv4/ip_forward') # enable kernel IP forwarding Make sure that the kernel IP forwarding is enabled, otherwise our machine will drop all traffic between the hosts we are trying to sniff, causing a denial of service.(“IP forwarding” is a synonym for “routing.” It is called “kernel IP forwarding” because it is a feature of the Linux kernel.).By ARP Spoofing between a computer and the LAN’s gateway an attacker can see all the traffic the computer is sending out and receiving.

Once the attacker has ARP Spoofed his way between two nodes he can sniff the connection. By doing this the attacker receives all network traffic going between Alan and Brian.

In the above image, the attacker is telling Alan’s box that he has the IP that corresponds to Brian’s box and vice versa.

Using a program like Arpspoof (part of the Dsniff package), we can lie to other machines on the local area network and tell them we have the IP they are looking for, thus funneling their traffic through us.

There are ways around switches though.

Switched networks are more secure and help speed up the network by only sending packets where they need to go.

#Arpspoof how to disable mac

A switch looks at the data sent to it and tries to only forward packets to its intended recipient based on the MAC address.In common hub networks all traffic can be seen by all hosts whose NICs (network interface card) are in promiscuous mode, but things are a bit different on switched networks.If you do happen to mess up your LAN, take a walk, come back several minutes later, pretend that the network was still working when you left. Fortunately any potential mis-configuration will be corrected to orignal state in few minutes.Be very cautious about testing these attacks/scripts in production environment(or in any network for that matter) ARP attacks can potentially mess your LAN configuration.