---
title: NETunnelProviderErrorDomain
framework: networkextension
role: symbol
role_heading: Global Variable
path: networkextension/netunnelprovidererrordomain
---

# NETunnelProviderErrorDomain

The domain used for Tunnel Provider errors.

## Declaration

```swift
let NETunnelProviderErrorDomain: String
```

## See Also

### Errors

- [NETunnelProviderError.Code](networkextension/netunnelprovidererror-swift.struct/code.md)
- [NETunnelProviderError.Code](networkextension/netunnelprovidererror-swift.struct/code.md)