DNS, WAF and Zero Trust: protecting your website and access

Most incidents start with phishing or a web vulnerability. Three simple layers drastically strengthen SMB security.

1) Secure DNS

• Filtering of malicious domains (blocks phishing and C2)
• DoH/DoT to encrypt queries
• Separate policies for guests/IoT
• DNS logs = valuable indicators of compromise

2) WAF (Web Application Firewall)

• Protects your website against injections, XSS, bots
• Rate limiting, anti-brute force logic, managed rules
• CDN + cache → performance and protection

3) Zero Trust for internal access

• Authentication MFA everywhere
• Least privilege : access per application, not per entire network
• Device posture : compliant PCs (encryption, antivirus, patches)

Quick best practices

• DNS: policies by groups + logging
• WAF: enable managed rules, challenge for bots, cache public pages
• Admin: MFA, FIDO2, managed passwords
• Centralized logging (SIEM/SOC) if possible