Campus network security: Attack scenarios, system vulnerabilities and security measures

In this study, DDoS, SQL injection, command injection, and XSS attacks that hackers use most in cyberattacks are modeled on the GNS3 emulator platform and network security is analyzed. A network scenario was designed using Graphical Network Simulator (GNS3), virtual machines, VMware workstations, firewalls, routers, and switches in order to examine the attacks on networks in the real environment. Attacks were performed on this network with different techniques and target servers and devices were affected by the attacks. At the time of the attack, network traffic between the attacker and the target device was recorded with Wireshark software. Network traffic records and traces were examined, evaluations of the attacks were made, and suggestions to be taken to protect against cyber attacks were presented considering the application results.