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# NEPacketTunnelNetworkSettings

The configuration for a packet tunnel provider’s virtual interface.

```
class NEPacketTunnelNetworkSettings
```

## Topics

### Accessing network properties

[`ipv4Settings`](/documentation/NetworkExtension/NEPacketTunnelNetworkSettings/ipv4Settings)

The tunnel IP version 4 settings.

[`NEIPv4Settings`](/documentation/NetworkExtension/NEIPv4Settings)

The IPv4 settings of an IP layer network tunnel.

[`ipv6Settings`](/documentation/NetworkExtension/NEPacketTunnelNetworkSettings/ipv6Settings)

The tunnel IP version 6 settings.

[`NEIPv6Settings`](/documentation/NetworkExtension/NEIPv6Settings)

The IPv6 settings of an IP layer network tunnel.

[`tunnelOverheadBytes`](/documentation/NetworkExtension/NEPacketTunnelNetworkSettings/tunnelOverheadBytes)

The number of bytes added to each tunneled packet for storing tunneling protocol headers.

[`mtu`](/documentation/NetworkExtension/NEPacketTunnelNetworkSettings/mtu)

The size of the maximum trasnmission unit, in bytes.


---

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