IP Address

[Sam Wilson]

Hi,

How can I get my the IP address of a computer using VBA? I was hoping it'd
be through environ() but it seems not...

Sam

 

[Rob Bovey]

How can I get my the IP address of a computer using VBA? I was hoping it'd
be through environ() but it seems not...

Hi Sam,

I've posted an example of how to do this here:

http://appspro.com/Tips/NetworkTips.htm#NT2

--
Rob Bovey, Excel MVP
Application Professionals
http://www.appspro.com/

* Professional Excel Development - Second Edition *
http://www.appspro.com/Books/ProExcelDev.htm

 

[Jacob Skaria]

Check out
http://www.source-code.biz/snippets/vbasic/8.htm

If this post helps click Yes

 

[Sam Wilson]

Not as straight forward as I'd guessed!

Hi Sam,

I've posted an example of how to do this here:

http://appspro.com/Tips/NetworkTips.htm#NT2

--
Rob Bovey, Excel MVP
Application Professionals
http://www.appspro.com/

* Professional Excel Development - Second Edition *
http://www.appspro.com/Books/ProExcelDev.htm

 

[Steve Yandl]

Sam,

Provided the PCs are XP or later, this might do what you want:

'------------------------------------

Sub GetIPaddy()

Dim strIPAddress As String
Dim strComputerName As String

strComputerName = "."

Set objWMIService = GetObject("winmgmts:\\" & strComputerName &
"\root\cimv2")

Set colItems = objWMIService.ExecQuery _
("Select * From Win32_NetworkAdapterConfiguration Where IPEnabled =
True")

For Each objItem In colItems
For Each objAddress In objItem.IPAddress
strIPAddress = objAddress
Next
Next

MsgBox strIPAddress

Set colItems = Nothing
Set objWMIService = Nothing

End Sub


'------------------------------------

Steve Yandl

 

[Rick Rothstein]

Hey! I just finished up some code using the same approach (and, from the
variable names, it looks like from the same source). I took a different end
route than you did, however, choosing to make my code a function instead.
Here is that code...

Function GetMyIPaddress() As String()
Dim X As Long, IPaddress() As String, Query As String
Dim Addresses() As String, objWMIService As Object
Dim ipConfigSet As Object, ipConfig As Object
Addresses = Split("")
Query = "Select IPAddress from Win32_NetworkAdapterConfiguration "
Set objWMIService = GetObject("winmgmts:\\.\root\cimv2")
Set ipConfigSet = objWMIService.ExecQuery(Query)
For Each ipConfig In ipConfigSet
If Not IsNull(ipConfig.IPaddress) Then
For X = LBound(ipConfig.IPaddress) To UBound(ipConfig.IPaddress)
'If ipConfig.IPaddress(X) Like "*#*.*#*.*#*.*#*" Then
ReDim Preserve Addresses(UBound(Addresses) + 1)
Addresses(UBound(Addresses)) = ipConfig.IPaddress(X)
'End If
Next
End If
Next
GetMyIPaddress = Addresses
End Function

The code returns a String array containing all the IP address on the system.
In my case, it found two...

192.168.1.3
fe80::40f4:21bf:bd1a:34e8

I don't know what that 2nd one is (I have no real experience with networks),
but the code returned it, so it must be 'something'<g>. Anyway, if the OP
wants only ###.###.###.### type IP addresses returned, the code is set up to
do that... he should just remove the apostrophes (comment symbols) from in
front of the two commented out lines in order to activate them... doing that
will make the function only return "normal" looking (at least to me) IP
addresses. To retrieve all the IP addresses on the system (either with or
without those commented out lines), code similar to this should be used...

Dim X As Long, IPaddresses() As String
IPaddresses = GetMyIPaddress
For X = 0 To UBound(IPaddresses)
Debug.Print IPaddresses(X)
Next

where the Debug.Print line would be replaced by the active code the OP wants
to use.

 

[jaf]

Hi Rick,
IPCONFIG reports it as "Link-local IPv6 Address "

It's the MAC address of your PCs LAN card or CNR.

Now we all can hack into your pc.
Thanks

8<)

John

 

[JoeU2004]

The code returns a String array containing all the IP address on the
system. In my case, it found two...
192.168.1.3
fe80::40f4:21bf:bd1a:34e8

I don't know what that 2nd one is

The first adress is an IPv4 address.

The second address is an IPv6 address, a "link local" address. Every link
interface (that has IPv6 enabled) is assigned its own "link local" address
automagically.

If you do not need IPv6 (most networks are IPv4-only), you should find some
way to disable it. Besides generating excess network traffic, IPv6 can be a
security risk. Although IPv6 was intended to be a more-secure network
protocol, first, most implementations do not include the security features,
and, second, there are "holes" in the protocol.

The good news is: since most networks do not support IPv6 routing, the
security risk might be ameliorated by the fact that you are on a trustworthy
intranet behind a firewall that probably does not have IPv6 support enabled.

PS: Don't forget to ignore 127.000.000.001, the IPv4 loopback address. And
beware of multiple IPv4 address on computers with multiple active link
interfaces, e.g. wired and wireless.


----- original message -----

 

[JoeU2004]

IPCONFIG reports it as "Link-local IPv6 Address "
It's the MAC address of your PCs LAN card or CNR.

Not exactly. Yes, it is a "link local" IPv6 address. And yes, the lower 64
bits are the link "interface id". The "interface id" is derived from the
MAC address. But it is not the MAC address exactly, in part depending on
the standard followed by the link interface.

In Rick's case, it does appear to be the 64-bit MAC address (almost). But
for 48-bit MAC addresses, the "interface id" in the IPv6 address is the two
halves (24 bits each) separated by 0xFFFE.

(And there are the "link local" IPv6 addresses for point-to-point interfaces
that might not have a MAC address.)

But in case, the 64-bit "interface id" differs from the MAC address (or
modified MAC address) by changing one bit from 0 to 1.

My point is: do not try to use the IPv6 "interface id" in the "link local"
address as MAC address directly.

PS: Rick, I wonder why you are seeing IPv6 addresses. Is this a Vista
thing? I do not see IPv6 on my interfaces, using Win XP SP3. But that
might be because I am relying on automatic configuration (DHCP) from a local
router. As I said, IPv6 is not widely used, at least not by default.


----- original message -----

 

[jaf]

Hi Joe,
As I said, IPCONFIG (in Vista) reported.....

John

 

[Ty]

Hi Joe,
As I said, IPCONFIG (in Vista) reported.....

John













- Show quoted text -

A Network question in the Excel section. Wow!! I love networking.
To answer the question for the 2nd or 3rd time up top. That is a
Machine address. All devices connected to a network have a machine
address. That is more important than an ip address depending on what
you are trying to accomplish.

 

[JoeU2004]

As I said, IPCONFIG (in Vista) reported.....

Unfortunately(?) I don't have Vista to look at. But what you said was
IPCONFIG reports "link-local IPv6 address". That much is correct. Then you
added: "It's the MAC address of your PCs LAN card or CNR". Since that is
without quotes, I assumed that is your interpretation, not something Vista
reported. Am I wrong?

In any case, it is __not__ the MAC address. It is an IP-layer address that
is __derived__ from a MAC address in the manner that I explained.


----- original message -----

 

[JoeU2004]

That is a Machine address.

Yes and no, depending on how you are (mis)using the terminology.

There is no such thing as a "machine address", at least not for networking
purposes.

There are link interface addresses, and there are upper protocol layer
addresses -- in this case, the IP layer.

Various people refer to the link-layer address and/or the IP address as a
"machine address". Some authors apply the term to both addresses in the
same text(!). The term is ambiguous and poorly used.

In any case, fe80::40f4:21bf:bd1a:34e8 is an IP-layer address --
specifically, the IPv6 layer. It is not a link interface address (aka MAC
address).

All devices connected to a network have a machine address.
That is more important than an ip address depending on what
you are trying to accomplish.

All interfaces connected to a network have one or more link-layer
addresses -- but usually only one. fe80::40f4:21bf:bd1a:34e8 is __not__ one
of them.

In any case, a link-layer address is no more nor less important than an IP
address.

To avoid launching (deeper) into Interworking 101, suffice it to that you
could not post your comments without both link-layer and IP (probably IPv4)
addresses, among others.


----- original message -----

Hi Joe,
As I said, IPCONFIG (in Vista) reported.....

John













- Show quoted text -

A Network question in the Excel section. Wow!! I love networking.
To answer the question for the 2nd or 3rd time up top. That is a
Machine address. All devices connected to a network have a machine
address. That is more important than an ip address depending on what
you are trying to accomplish.

 

[JoeU2004]

Errata....

In any case, a link-layer address is no more
nor less important than an IP address.

Okay, I'll concede that one might argue that the link-layer address is more
important, because Ty qualified his statement with "depending on what you
are trying to accomplish".

Most people think of "networking" as synonymous with "TCP/IP networking", a
term that is usually intended to encompass all of the "Internet Procotol
Suite", once known as the (D)ARPA protocols.

In that context, both addresses are equally important.

But there are other network-layer protocols besides IP(v4 and v6). The
point is: all network layer require the link-layer address, but not all
network layers use IP addresses.

In that sense, someone (not me) might say that the link-layer address may be
considered more important.


----- original message -----

 

[Charlotte E]

Quick UDF to do the trick:
http://www.EXCELGAARD.dk/Lib/UDFs/IP/