Importing iOS Proxy Certificates
Note: In iOS 11, manually installed certificates are no longer trusted by default. You have to manually trust installed certificates.
1. Download the certificate from Settings > Appliance: SSL Certificate.
2. Once you have downloaded the certificate, tap the Install button. (if you get a warning, tap Install again)
3. Tap the Done button.
4. On your device, go to Settings > General > About > Certificate Trust Settings and enable the certificate under Enable Full Trust for Root Certificates.