Project One Stepping Stone - Bolinsky 1 CYB-310-J8939 Project One Stepping Stone Network Troubleshooting Practice Michael Bolinsky Southern New Hampshire University Professor Ostering May 16, 2024
Network Troubleshooting - Bolinsky 2 Network Deficiencies You are interviewing for a cybersecurity analyst position. As part of the interview process, the company tests all candidates' troubleshooting capabilities. The company provides you with a GNS3 virtual network in a sandbox environment and asks you to demonstrate your troubleshooting skills. Open the CYB 310 Sandbox and click on the GNS3 icon. Open the Project One Stepping Stone file to troubleshoot and resolve the following issues: 1. The Sales Department network segment needs read/write/execute privileges to the Customer Service Department network segment. 2. The workstations in the Human Resources Department cannot access the internet. I. Issue One i. Identify the configuration error causing the issue by providing appropriate screenshot(s). I. The configuration error in this ticket turned out to be a default firewall rule created automatically when the firewall was installed. The rule prevented private IP address access into your public space or network. As a defense mechanism pfSense creates this rule as a default which if what caused our issue. Rules (Drag to Change Order) States Protocol Source Port Destination Port Gateway Queue Schedule Description Actions × 0/6 * K?B Reserved Not assigned by IANA Block bogon networks
Network Troubleshooting - Bolinsky 3 ii. Troubleshoot the issue and provide screenshots of a resolution. I. Step 1 - I attempted to ping a customer service computer (IP 192.168.2.10) from a sales computer (IP 192.168.1.10) and was unable to reach the destination. C: \Windows\System32>ping 192.168. 2. 10 Pinging 192.168.2.10 with 32 bytes of data: Request timed out. Request timed out. Request timed out. Request timed out. Ping statistics for 192.168.2.10: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), II. Step 2 - I reversed the process checking connection from customer service computer (IP 192.168.1.10) to the sales computer (IP 192.168.1.10) and connection was successful. III. Step 3 - Since connectivity is a one way issue the switches are not expected to be the issue. This would leave the probable culprit to be the firewall. From PC1_Subnet2 I logged into the router at the default gateway of IP 192.168.2.1 and logged into the firewall to verify correct settings. C:\Windows\System32>ping 192. 168.1.10 Pinging 192.168.1.10 with 32 bytes of data: Reply from 192. 168. 1. 10: bytes=32 time=2ms TTL=127 Reply from 192.168.1.10: bytes=32 time=2ms TTL=127 Reply from 192. 168.1.10: bytes=32 time=1ms TTL=127 Reply from 192. 168.1.10: bytes=32 time=1ms TTL=127 Ping statistics for 192.168.1.10: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 1ms, Maximum = 2ms, Average = 1ms