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# ttlsInnerAuthenticationType

The inner-layer authentication protocol used by a TTLS module.

```
var ttlsInnerAuthenticationType: NEHotspotEAPSettings.TTLSInnerAuthenticationType { get set }
```

## Discussion

Optional. Supported protocols include PAP, CHAP, MS-CHAP, MS-CHAPv2, and EAP. The default protocol is EAP. For values, see [`NEHotspotEAPSettings.TTLSInnerAuthenticationType`](/documentation/NetworkExtension/NEHotspotEAPSettings/TTLSInnerAuthenticationType-swift.enum).

---

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