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Introduction:
Taking over as a new IT leader or CISO comes with immense responsibility—especially when documentation is outdated, systems are sprawling, and cyber risks loom. Alexandre Daoust, CEO of Sewlau, outlines five essential cybersecurity steps to prioritize on day one to secure the organization effectively.
Learning Objectives:
- Understand how to map and secure your IT infrastructure.
- Implement streamlined yet secure authentication methods.
- Strengthen backup strategies, employee awareness, and disaster recovery plans.
1️⃣ Know Your IT Infrastructure Inside Out
Why it matters: You can’t protect what you don’t know. A clear inventory of all software, hardware, and network components is crucial.
Step-by-Step Guide:
- Run a network scan to identify active devices:
nmap -sn 192.168.1.0/24
This scans for live hosts in the subnet.
2. List installed software (Windows):
Get-WmiObject -Class Win32_Product | Select-Object Name, Version
3. Document cloud services using:
aws ec2 describe-instances (for AWS)
Replace `ec2` with relevant services (e.g., `s3` for storage).
2️⃣ Simplify & Secure Authentication
Why it matters: Complex logins frustrate users and weaken security. Single Sign-On (SSO) and passwordless methods improve both security and usability.
Step-by-Step Guide:
1. Enable SSO via Azure AD:
Connect-AzureAD New-AzureADServicePrincipal -DisplayName "SSO-App"
2. Deploy FIDO2 keys for passwordless login:
sudo apt install libfido2-dev (Linux setup)
3. Enforce Conditional Access (Microsoft 365):
New-ConditionalAccessPolicy -Name "Block-Legacy-Auth" -Conditions $conditions
3️⃣ Verify Backup & Security Policies
Why it matters: Outdated backups or misconfigured firewalls can lead to catastrophic failures.
Step-by-Step Guide:
1. Test backups (Linux):
tar -cvzf backup_$(date +%F).tar.gz /critical_data
2. Audit firewall rules:
sudo iptables -L -v -n
3. Check for unpatched vulnerabilities:
sudo apt update && sudo apt upgrade -y
4️⃣ Ramp Up Cybersecurity Training
Why it matters: Human error causes 85% of breaches. Regular training reduces risks.
Step-by-Step Guide:
1. Simulate phishing attacks (using GoPhish):
docker run --name gophish -p 3333:3333 -p 80:80 gophish/gophish
2. Automate security alerts (SIEM setup):
sudo apt install wazuh-manager
5️⃣ Review & Test Disaster Recovery (PRA)
Why it matters: A non-functional recovery plan is as bad as no plan.
Step-by-Step Guide:
1. Test failover (AWS):
aws rds reboot-db-instance --db-instance-identifier your-db --force-failover
2. Verify backup restoration:
mysql -u root -p < backup.sql
What Undercode Say:
- Key Takeaway 1: A structured approach to IT inventory and authentication prevents chaos.
- Key Takeaway 2: Proactive testing of backups and disaster recovery ensures resilience.
Analysis: Many new IT leaders dive into strategic projects without securing fundamentals. By prioritizing these five steps, they mitigate immediate risks while building long-term security maturity.
Prediction:
As cyber threats evolve, organizations that enforce these steps early will reduce breach risks by 40%+ compared to those delaying action. Automation (AI-driven IAM, zero-trust policies) will further streamline these processes in 2024–2025.
Now it’s your turn—what would you add to this checklist? 🚀
🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Alexandre Daoust – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
