Computer Networks/Troubleshooting/Security Issues

This lesson covers security issues.

Objectives and Skills

Objectives and skills for the security issues portion of Network+ certification include:^[1]

• Given a scenario, troubleshoot and resolve common security issues
  • Misconfigured firewall
  • Misconfigured ACLs/applications
  • Malware
  • Denial of service
  • Open/closed ports
  • ICMP related issues
    • Ping of death
    • Unreachable default gateway
  • Unpatched firmware/OSs
  • Malicious users
    • Trusted
    • Untrusted users
    • Packet sniffing
  • Authentication issues
    • TACACS/RADIUS misconfigurations
    • Default passwords/settings
  • Improper access/backdoor access
  • ARP issues
  • Banner grabbing/OUI
  • Domain/local group configurations
  • Jamming

Multimedia

1. Watch YouTube: Troubleshooting Firewall Security Issues - CompTIA Network+ N10-006 - 4.7.
2. Watch YouTube: Troubleshooting Operating System Security Issues - CompTIA Network+ N10-006 - 4.7.
3. Watch YouTube: Troubleshooting Denial of Service - CompTIA Network+ N10-006 - 4.7.
4. Watch YouTube: Troubleshooting ICMP and ARP - CompTIA Network+ N10-006 - 4.7.
5. Watch YouTube: Troubleshooting Malicious User Activities - CompTIA Network+ N10-006 - 4.7.
6. Watch YouTube: Troubleshooting Authentication Issues - CompTIA Network+ N10-006 - 4.7.

References