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dhcpstarv - Online in the Cloud

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dhcpstarv - DHCP starvation attack.


dhcpstarv -h

dhcpstarv [-epv] [-d MAC] -i IFNAME


-d, --dstmac=MAC
Use MAC as destination hardware address for DHCP requests. Default is to use
broadcast address.

-e, --exclude=ADDRESS
Ignore replies from server with IP address ADDRESS. This must be valid IP address
DHCP server include in replies as server ID. Usually this is a primary IP address
of interface which is connected to client's network segment.

-h, --help
Print help and exit.

-i, --ifname=IFNAME
Send requests and receive responses on network interface IFNAME.

-p, --no-promisc
Do not set network interface to promiscuous mode. Some servers send replies to
hardware address stored in DHCP options in spite of broadcast option presence, in
which case this option cause dhcpstarv not to receive server replies.

-v, --verbose
Print verbose messages.


DHCP starvation is attacking a DHCP server by sending a lot of requests to it. This lead
to server's address pool exhausting after which DHCP server is not able to respond clients
and give them new leases.

dhcpstarv is tool that implements DHCP starvation attack. It requests DHCP leases on
specified interface, save them and renew on regular basis.

When a rogue DHCP server appear in network with DHCP infrastructure some clients can get
wrong network settings. Those rogue servers can be switched by users by accident. The only
solution to issue is to disconnect such server from network. But it takes a lot of time
to discover rogue server if network is complicated, i.e. there are many network devices in
it. As a temporary solution you can attack rogue DHCP server until find and disconnect it
from network.


Copyright (C) 2007 Dmitry Davletbaev

This program is licenced under GNU General Public License version 3.

This program comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome
to redistribute it under certain conditions; see <http://www.gnu.org/licenses/> for

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