2025-02-12
1️⃣ Basics to Master
- CIA Triad: Confidentiality 🔏, Integrity ✅, Availability 🌐
- Cyber Threats: Malware 🦠, Phishing 🎣, Ransomware 💰, DDoS 💥
- Encryption & Hashing: AES, RSA, SHA 🔐
- Network Security: Firewalls 🚧, VPNs 🛜, IDS/IPS 🧐
- Authentication: MFA 🔄, SSO 👤
2️⃣ Networking & OS
- Networking: OSI Model 📶, Ports 🔢 (80, 443, 22), Protocols 🔄 (HTTP/S, DNS)
- OS: Linux 🐧 (Commands, Logs), Windows 🪟 (Active Directory, Event Logs)
3️⃣ Must-Know Tools
- SIEM: Splunk, QRadar 📊
- EDR: CrowdStrike, Defender 🛡️
- Scanning: Nessus, Qualys 🛑
- Packet Analysis: Wireshark 🌊
- PenTesting: Nmap, Burp Suite 🛠️
4️⃣ Common Interview Qs
- What is Cybersecurity? 🛡️
- Explain Firewall & VPN. 🚧
- Hashing vs Encryption? 🔄🔐
- How does SIEM help in security? 📊
- How to respond to a brute-force attack? 🛑🔑
5️⃣ Hands-on Learning
- TryHackMe & Hack The Box 🎯
- Splunk Fundamentals 📊
- Virtual Labs (Linux, Windows, Wireshark) 🖥️
6️⃣ Certifications for Boost
- CompTIA Security+ �
- CEH | SC-200 | Splunk Certified 🎓
7️⃣ Resume & Interview Tips
- Highlight Certifications & Projects 📜
- Keep Resume 1-2 Pages 📄
- Stay Updated (Hacker News, CISA) 📰
- Be Confident, Be Honest! 💪
What Undercode Say
Cybersecurity is a dynamic field that requires a blend of theoretical knowledge and practical skills. For freshers preparing for interviews, mastering the basics like the CIA Triad and understanding common cyber threats is crucial. Hands-on experience with tools like Wireshark, Nmap, and Splunk can set you apart.
Here are some Linux commands and tools to enhance your cybersecurity skills:
1. Network Scanning with Nmap:
nmap -sP 192.168.1.0/24
This command scans the network for active devices.
2. Packet Analysis with tcpdump:
sudo tcpdump -i eth0 -w capture.pcap
Captures network traffic on the eth0 interface and saves it to a file.
3. Log Analysis with grep:
grep "Failed password" /var/log/auth.log
Searches for failed login attempts in the auth log.
4. File Integrity Check with sha256sum:
sha256sum important_file.txt
Generates a hash to verify file integrity.
5. Firewall Configuration with ufw:
sudo ufw allow 22/tcp
Allows SSH traffic through the firewall.
6. VPN Setup with OpenVPN:
sudo openvpn --config client.ovpn
Connects to a VPN using a configuration file.
7. Malware Analysis with strings:
strings suspicious_file | grep "http"
Extracts strings from a binary file to identify potential malicious URLs.
8. Brute-Force Protection with fail2ban:
sudo fail2ban-client status sshd
Checks the status of fail2ban for SSH protection.
9. Encryption with OpenSSL:
openssl enc -aes-256-cbc -salt -in file.txt -out file.enc
Encrypts a file using AES-256 encryption.
10. SIEM Log Collection with rsyslog:
sudo nano /etc/rsyslog.conf
Configures rsyslog to forward logs to a SIEM server.
For further reading, check out these resources:
Cybersecurity is not just about tools and commands; it’s about understanding the mindset of attackers and staying one step ahead. Keep practicing, stay curious, and never stop learning.
This article is human-written and tailored for freshers aiming to excel in cybersecurity interviews.
References:
Hackers Feeds, Undercode AI
