---
title: NEIPv4Settings
framework: networkextension
role: symbol
role_heading: Class
path: networkextension/neipv4settings
---

# NEIPv4Settings

The IPv4 settings of an IP layer network tunnel.

## Declaration

```swift
class NEIPv4Settings
```

## Overview

Overview To specify the IPv4 settings of a packet tunnel, set its NEPacketTunnelNetworkSettings.ipv4Settings property to an instance of this class.

## Topics

### Initializing IPv4 settings

- [init(addresses:subnetMasks:)](networkextension/neipv4settings/init(addresses:subnetmasks:).md)

### Accessing IPv4 properties

- [addresses](networkextension/neipv4settings/addresses.md)
- [subnetMasks](networkextension/neipv4settings/subnetmasks.md)
- [router](networkextension/neipv4settings/router.md)

### Routing network traffic

- [includedRoutes](networkextension/neipv4settings/includedroutes.md)
- [excludedRoutes](networkextension/neipv4settings/excludedroutes.md)
- [NEIPv4Route](networkextension/neipv4route.md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)

## See Also

### Accessing network properties

- [ipv4Settings](networkextension/nepackettunnelnetworksettings/ipv4settings.md)
- [ipv6Settings](networkextension/nepackettunnelnetworksettings/ipv6settings.md)
- [NEIPv6Settings](networkextension/neipv6settings.md)
- [tunnelOverheadBytes](networkextension/nepackettunnelnetworksettings/tunneloverheadbytes.md)
- [mtu](networkextension/nepackettunnelnetworksettings/mtu.md)