void11 is a 802.11(b) wireless network penetration utility. It implements basic attacks like de-authentication flooding (network dos) and authentication flooding (access point dos). void11 automatically searches and attacks target networks, stations or access points configurable by simple match-list expressions. It is possible to deny all 802.11(b) wireless service in a range, because of it's "roaming" capability. void11 has been built on top of the Linux hostap daemon and provides a simple command-line interface and a clicky-bunty gtk+-2 interface.