Powershell: Get System IP Address

For logging purposes, I needed to get the ethernet ip address for a system. I could parse ipconfig, using regex to find the address based on my subnet, or the simple powershell way with Get-NetIPAddress.

To make things a bit easier, and to avoid issues where your ip address is not what is expected, you could use one of the following:

((Get-NetIPAddress | Where-Object InterfaceAlias -match Ethernet) `
     | Where-Object AddressFamily -Match IPv4).IPAddress

((Get-NetIPAddress | Where-Object InterfaceAlias -match Ethernet) `
     | Where-Object AddressFamily -Match IPv6).IPAddress

((Get-NetIPAddress | Where-Object InterfaceAlias -match Wi-Fi) `
     | Where-Object AddressFamily -Match IPv4).IPAddress

((Get-NetIPAddress | Where-Object InterfaceAlias -match Wi-Fi) `
     | Where-Object AddressFamily -Match IPv6).IPAddress

Obviously, your mileage may vary. For instance, the system I am on now does not obtain IPv6 addresses. My target system does.

How does this work? Get-NetIPAddress returns an object with all of your ip addresses; ethernet, wi-fi, loopback, vpn, vm adapters, etc. You may not be interested in all of these. In my case, I am only interested in the IPv4 ethernet address of a system. Get-NetIPAddress gets me all interfaces. Get-NetIPAddress | Where-Object InterfaceAlias -match Ethernet on my IPv4/IPv6 system gives me:

IPAddress         : aa11::bb22:cc33:dd44:ee55%4
InterfaceIndex    : 4
InterfaceAlias    : Ethernet
AddressFamily     : IPv6
Type              : Unicast
PrefixLength      : 64
PrefixOrigin      : WellKnown
SuffixOrigin      : Link
AddressState      : Preferred
ValidLifetime     : Infinite ([TimeSpan]::MaxValue)
PreferredLifetime : Infinite ([TimeSpan]::MaxValue)
SkipAsSource      : False
PolicyStore       : ActiveStore

IPAddress         : 192.168.0.2
InterfaceIndex    : 4
InterfaceAlias    : Ethernet
AddressFamily     : IPv4
Type              : Unicast
PrefixLength      : 24
PrefixOrigin      : Dhcp
SuffixOrigin      : Dhcp
AddressState      : Preferred
ValidLifetime     : 21:43:14
PreferredLifetime : 21:43:14
SkipAsSource      : False
PolicyStore       : ActiveStore

To break this down and get just the IPv4 entry, we pipe our expression again through a new Where-Object:

(Get-NetIPAddress | Where-Object InterfaceAlias -match Ethernet) `
     | Where-Object AddressFamily -Match IPv4

IPAddress         : 192.168.0.2
InterfaceIndex    : 4
InterfaceAlias    : Ethernet
AddressFamily     : IPv4
Type              : Unicast
PrefixLength      : 24
PrefixOrigin      : Dhcp
SuffixOrigin      : Dhcp
AddressState      : Preferred
ValidLifetime     : 21:43:14
PreferredLifetime : 21:43:14
SkipAsSource      : False
PolicyStore       : ActiveStore

To get just the IPv4 address, enclose the entire expression, and then request the property desired.

((Get-NetIPAddress | Where-Object InterfaceAlias -match Ethernet) `
     | Where-Object AddressFamily -Match IPv4).IPAddress

192.168.0.2