---
title: networkInterface
framework: networkextension
role: symbol
role_heading: Instance Property
path: networkextension/neappproxyflow/networkinterface
---

# networkInterface

The network interface, if any, used by this flow.

## Declaration

```swift
@NSCopying var networkInterface: nw_interface_t? { get set }
```

## Discussion

Discussion To transport the flow’s data over a different interface, set this property to that interface.

## See Also

### Accessing flow information

- [metaData](networkextension/neappproxyflow/metadata.md)
- [setMetadata(_:)](networkextension/neappproxyflow/setmetadata(_:).md)
- [nw_parameters_t](network/nw_parameters_t.md)
- [isBound](networkextension/neappproxyflow/isbound.md)
- [nw_interface_type_t](network/nw_interface_type_t.md)
- [remoteHostname](networkextension/neappproxyflow/remotehostname.md)