Hi all,
I faced a weird issue: I'm using Comodo Radius server certificate in CPPM and all devices work well with wireless 802.1X with EAP-PEAP except iOS devices. It seems that they don't trust my certificate:

My certificate is build like this:
ROOT CA (CN=AddTrust External CA Root) -> INTERMEDIATE CA (CN=COMODO RSA Certification Authority) -> INTERMEDIATE CA (CN=COMODO RSA Domain Validation Secure Server CA) -> MY-CPPM-SERVER-CERT (CN=COMODO RSA Domain Validation Secure Server CA)
All the other devices such Androids trust the certificate and the problems seems to be only with iOS devices. The root CA should be trusted in iOS (here's the list: https://support.apple.com/en-gb/HT204132).
Any suggestions for this?