dhcpstarv(1) DHCP starvation attack.

SYNOPSIS

dhcpstarv -h

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

OPTIONS

-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.

DESCRIPTION

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

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 details.

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