[IEEE 2019 International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2) - Rajshahi, Bangladesh (2019.7.11-2019.7.12)] 2019 International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2) - Detecting and Preventing IP Spoofing and Local Area Network Denial (LAND) Attack for Cloud Computing with the Modification of Hop Count Filtering (HCF) Mechanism