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Sophos Firewall Hardening Checklist 2026

Sophos Firewall is a powerful next-generation firewall designed to protect modern organizations from cyber threats. This guide covers the most important security best practices for hardening Sophos XGS firewalls and improving your overall security posture.

1. Enable Multi-Factor Authentication (MFA)

Enable MFA for all administrator accounts. This significantly reduces the risk of unauthorized access even if passwords are compromised.

2. Restrict WAN Access

Avoid exposing management interfaces directly to the internet. Only allow administrative access from trusted IP addresses.

3. Use Strong Password Policies

Strong passwords remain one of the most important security controls.

4. Keep Firmware Updated

Install the latest SFOS updates and security patches to protect against newly discovered vulnerabilities.

5. Disable Unused Services

Reduce the attack surface by disabling services that are not required.

6. Enable IPS and Threat Protection

Intrusion Prevention Systems help detect and block malicious traffic before it reaches internal systems.

7. Configure Log Monitoring

Logs provide visibility into attacks, policy violations, and suspicious activity.

8. Backup Firewall Configuration

Maintain regular backups of firewall configurations to support disaster recovery.

Conclusion

Implementing these hardening measures can significantly improve the security of your Sophos Firewall deployment and reduce exposure to cyber threats.