I'm Using NEVPNManager to Connect to IKEv2 VPN Server which uses certificate in p12 or .cer file to authenticate for connection. here my code snippet for connecting to server.     let vpnManager = NEVPNManager.shared();         vpnManager.loadFromPreferences { (_: Error?) in                      }                  let p = NEVPNProtocolIKEv2()         p.authenticationMethod = NEVPNIKEAuthenticationMethod.none         p.useExtendedAuthentication = true         p.serverAddress = "******"         p.remoteIdentifier = "*****"         p.disconnectOnSleep = false         let certificateFile = Bundle.main.path(forResource: "myvpn", ofType: "p12")!         let certificateData = NSData(contentsOfFile: certificateFile)!         p.identityData = certificateData as Data         p.identityDataPassword = "*******"         vpnManager.protocolConfiguration = p         vpnManager.localizedDescription = "Apple VPN"         vpnManager.isEnabled = true         vpnManager.saveToPreferences(completionHandler: nil)         vpnManager.loadFromPreferences { (_: Error?) in                      }                  do{             try vpnManager.connection.startVPNTunnel()         }catch{             print(error)         } This Code will create a vpn profile in vpn section of iOS setting part. The Problem is that I can not understand how should I pass the .p12 file or .cer file to NEVPNProtocolIKEv2 for authentication. Note : Currently I am able to connect to server by installing .p12 and .cer file manually in setting. so the server is up and working without any problem. Is this way wrong ? How can I connect to IKEv2 VPN Server Programmatically? Thanks