This paper aims at improving one of the most important vulnerabilities of IEEE 802.11x wireless networks that is sending the management packets on unencrypted channels. Adversaries exploit this weakness for executing attacks such as man‐in‐the‐middle and evil twin. The reported work proposes a novel wireless intrusion response scheme called Rashnu to deal with these attacks. Rashnu is a third party wireless intrusion response scheme and is capable of rescuing the victim(s), that is, access point's clients. The proposed response approach is simulated in Omnet++ environment to appraise its effectiveness. Simulation results show that Rashnu can respond to these attacks with more than 65% success rate. Changing the access point selection strategy in the agent layer of the victim's wireless network interface card, 35% attacker's success rate is reduced to 8%. Eventually, improving Rashnu by tuning the response rate factor can modify this value by only 2.7%. Copyright © 2014 John Wiley & Sons, Ltd.