SSL Inspection: Benefits and Considerations
Most traffic is encrypted. Inspecting it improves security but needs careful policy design.
Most web traffic today is encrypted with TLS (often still called SSL). Encryption protects privacy, but it also hides threats from security tools. SSL inspection lets firewalls decrypt, inspect and re-encrypt traffic.
Why it matters
Malware downloads, phishing pages and command-and-control traffic increasingly use encryption. Without inspection, firewalls see only destination names and cannot examine content.
How it works
The firewall acts as an intermediary, establishing separate encrypted connections with the user and the website. Company devices trust the firewall's certificate, which is distributed through device management.
Benefits
- Detect malware in encrypted downloads
- Apply data loss prevention to uploads
- Enforce granular application controls
- Improve visibility into threats
Privacy considerations
Inspecting encrypted traffic can expose sensitive personal data. Exclude categories such as banking, healthcare and government services, and communicate policies clearly to employees.
Compatibility
Some applications use certificate pinning and break under inspection. Maintain an exclusion list for these services.
Performance
Decryption is resource-intensive. Appliances need adequate capacity; cloud firewalls scale automatically.
Certificate management
Distribute and manage inspection certificates securely, and protect the private keys.
Legal and policy alignment
Ensure inspection aligns with company policies and applicable regulations.
Start selectively
Begin with high-risk categories and expand gradually.
The bottom line
SSL inspection significantly improves threat visibility when designed thoughtfully, with privacy exclusions and clear policies.
Learn more about Cloud Firewall from UbiFi, or talk to our team.
Next-generation firewall delivered from the cloud — intrusion prevention, application control and secure remote access for every site.
