WiMax is a wireless based technology standard that provides high throughput broadband connections over long distances. Security is one of the major considerations in broadband wireless access especially when wireless devices are added to it. Wimax/802.16 is also not free from vulnerability, threats, risks or other attacks to provide secured and robust services like as other standards 802.11 and so on. With the high and effective security confirmation, this technology would be more reliable and trustworthy. This paper works on all possible attacks of Wimax standard and provided their solutions which separately came on light so far. This research found some difficulties in the security of 802.16 transmissions and then proposed solutions for that. Also, a simulation work has been done in dot net framework with C# language and illustrated the justification of the research result.