Class IPAddressExtensions

NAT extensions to the IPAddress class.

Inheritance

Object

IPAddressExtensions

Inherited Members

Object.ToString()

Object.Equals(Object)

Object.Equals(Object, Object)

Object.ReferenceEquals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Namespace: Makaretu.Nat

Assembly: Makaretu.Nat.dll

Syntax

public static class IPAddressExtensions

Remarks

IsPrivate(IPAddress) and IsPublic(IPAddress) determines if an IP address is reachable from the public internet; see RFC 1918 for more details.

Methods

IsPrivate(IPAddress)

Determines if the IP address belongs to a private internet.

Declaration

public static bool IsPrivate(this IPAddress address)

Parameters

Type	Name	Description
IPAddress	address	The IP address to test.

Returns

Type	Description
Boolean	true if the address is private; otherwise, false.

Remarks

RFC 1918 defines the following as private addresses (in CIDR notation)

• 10/8
• 172.16/12
• 192.168/16

Loop back addresses are considered private.

If the address IsIPv4MappedToIPv6, then the IPv4 address is tested.

IPv6 ULA addresses are always private.

IsPublic(IPAddress)

Determines if the IP address does not belong to a private internet.

Declaration

public static bool IsPublic(this IPAddress address)

Parameters

Type	Name	Description
IPAddress	address	The IP address to test.

Returns

Type	Description
Boolean	true if the address is public; otherwise, false.

Remarks

This is the inverse of IsPrivate(IPAddress).