Microsoft Windows DHCP Team Blog

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, October 11, 2007 2:31 AM

It's very cool, but where is the setup document exactly?

gt

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, October 11, 2007 3:34 PM

Uhhh, and where is this folder? Through install (on w2k3 r2) I can't choose the target folder, and sorry, but I don't find any files, but only a MacFilterCallout.dll in System32...

gt

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, October 12, 2007 9:36 AM

Thank you for your help, the exact file name is SetupDHCPMacFilter.rtf.

gt

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, October 18, 2007 6:55 AM

I cant seem to find the correct configuration file syntax.

I have a file named DHCPMACFILTER.TXT, have specified its full pathname in the relevant registry key (in Parameters like said above, Win2k3 here) and inside has 2 lines:

MAC_ACTION = ALLOW

0020ED8E9E7E

The error file says that "File format not proper" and the info files that the DHCP server has started.

If I remove the MAC address and leave only the MAC_ACTION line then I get again "File format not proper" in the error file, but now the info file has:

The DHCP server has successfully started.

Thu Oct 18 13:54:52 2007 0018f3047478 Allow

Please advice further...

Thanks.

Kostas

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, October 18, 2007 11:02 PM

i cant see any logs 1033 from the event viewer.

akira

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, October 19, 2007 2:48 AM

Thanks for your answer, it works perfectly.

Gee... never thought the curly brackets where part of the syntax as their usual meaning is to specify the set of disticnt values allowed.

Anyway, thanks again, very useful addon.

Kostas

# MAC address filtering (DHCP) @ Saturday, October 27, 2007 6:22 AM

This is a feature I have been waiting for way too long. Up until today if you wanted to have some control

My Notes to Myself and Others...

# MAC address filtering (DHCP) @ Saturday, October 27, 2007 6:31 AM

This is a feature I have been waiting for way too long. Up until today if you wanted to have some control

My Local Notes to Myself and Others...

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, October 30, 2007 7:56 PM

What about classifying a device (VOIP phone) so that it's thrown into a separate range of IP addresses like ISC DHCP allows for?

I can classify my phones (all NEC) based on the first three parts of the MAC ID so that they're assigned IP's in the 10.30.15 range, but never into 10.30.13 or 10.30.14.

This is a VERY DESIRED feature that isn't addressed anywhere in the DHCP services.

Armando Ortiz

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, November 09, 2007 7:47 AM

This seems to be nearly what we need for our application, but is it possible to use a range of MAC addresses?

For example we have a range of addresses for an embedded system, and we want to use DHCP for assigning an IP address, without interferance with the our office network.

Something like following will solve this :

MAC_ACTION = DENY

001A85******

Thanks in advance

Stefaan

SVHB

# re: DHCP Server Callout DLL for MAC Address based filtering @ Sunday, November 11, 2007 11:21 AM

This all sounds great, but I wish that instead of doing this:

MAC_ACTION={ALLOW}

000b0e994401

000b0e994402

000b0e994403

000b0e994404

000b0e994405

I could do this:

MAC_ACTION={ALLOW}

000b0e*

That way I could permit DHCP to any vendor specific device and deny DHCP to all others without having to make periodic changes to the MAC list and worry about stopping/starting the service.  We have 3000+ devices (all from one vendor) that we want to get DHCP while not allowing it for anything else.  Anyone know if this will work?

Curtis

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, November 21, 2007 12:20 PM

Hi!

This looks great, I wish I could make it work.. I have set the values, and it all looks good. The filter file maclist.txt looks like this:

MAC_ACTION={DENY}

000742a72dea

the log says

Thu Oct 18 13:54:52 2007 000742a72dea Allow

the error file says

file format not proper

It looks like same error as above, but I have the {}, I have tried to add/remove spaces around =, but no luck. Text encoding is ANSI, I have tried UTF-8, but I guess this shouldnt make a diffecence. Where do I go from here?

Tor Arne Pedersen

Tor Arne Pedersen

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, November 27, 2007 1:22 PM

I redid it all, and it worked perfectly. Thanks for this tool. I wonder how I can make IPs be leased forewer, I guess callout.dll could do this.

Tor Arne Pedersen

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, November 28, 2007 8:47 PM

Is the Callout filtering can support wildcard if I want to deny all as to 101010 beginning MAC addresses?

Arlen

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, November 29, 2007 7:41 PM

I would like to know that Infolog files have the max size constraints.

Arlen

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, December 07, 2007 7:10 AM

Even after adding the mac address in the allow list, server is not serving IP to the specified pc. seems some bug on the dll.

SENTHIL SIVALINGAM

# re: DHCP Server Callout DLL for MAC Address based filtering @ Monday, December 10, 2007 1:14 AM

Hey Pandya

I perfectly configured as per the doc, when I see the log  there were many deny messages for the Mac address which is in allow list.

My environment is Win2k3-Sp2 and in fact I have checked with a desktop and few laptops mac addresses included in the allow list. But as per the log those are comes under denied.

Looking for your help.

SENTHIL SIVALINGAM

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, December 11, 2007 7:32 AM

Hey

I have configured only Allow list.

SENTHIL SIVALIGAM

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, December 11, 2007 4:22 PM

Thanks for this tool!  I see that wildcards are not supported, but are there plans to support mac wildcards in a future release?

Chris G

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, December 12, 2007 10:20 AM

Is it planned to add wildcard feature to your tool?

As on other post here I would like to deny all requests from e.g. IP phones.

Best regards,

Juergen

Juergen Weickl

# re: DHCP Server Callout DLL for MAC Address based filtering @ Monday, December 17, 2007 12:25 PM

Thx so much for this addition. I was really cursing MSDHCP until I found this bit. It works great, and plan on rolling it into production soon.

Erik

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, December 18, 2007 7:40 PM

Is it possible for the callout to have an allowed mac address list per subnet?

To explain: We wish to secure our devices (thin clients) from being moved physically from office to office (subnet to subnet).

AdamF

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, December 21, 2007 3:09 PM

I followed the directions precisely and it worked great. Thanks for including something that SHOULD have been included OEM on the DHCP server.

Cheers

Jonathan

Jonathan

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, December 26, 2007 12:55 AM

Dear Raunak Pandya

I have configured Collect DLL for my DHCP server but it's not running. i think my configure is OK but why not working?

"This key specifies callout dll path for dhcp server e.g. c:\calloutdll\<calloutdll name>.dll" this description's "calloutdll name" is which file ? may i put in MacFilterCallout.dll file there? is it right?

please tell me all of configuration how do it exactly if it possible?

thanks

Oyunbat

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, January 02, 2008 8:51 AM

Hi Raunak

A quick question to you. Do we need to restart the service whenever we are adding mac address on the allow list? Cos the server doesn't supply IP's without restart, simply denies.

I think thats where the issue I had faced last time.

SENTHIL SIVALINGAM

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, January 03, 2008 7:43 AM

Excuse me, but I don't have the money to set up a W2K3 machine.  Can callout DLL work on a XP Home acting as a gateway?  And is callout DLL uninstallable?

Rick Ng

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, January 10, 2008 10:59 PM

Must you restart the DHCP Service when you modify the MAC filter list?

Aaron

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, January 15, 2008 11:08 AM

I tested this tool on two distinct dhcp servers and they both denied all IP addresses even though there was only one MAC address in the config file with the DENY option or allowed them all, again even though there was only one MAC address in the config file with the ALLOW option :-(. This also applied after I restarted the DHCP server service..

Jens

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, January 17, 2008 8:51 AM

Dear Raunak Pandya

Thanks for this tool

Is it planned to add comments to file with MAC addresses? It would be easier to find to whom belongs specific MAC address.

S.M.

S.M.

# re: DHCP Server Callout DLL for MAC Address based filtering @ Monday, January 21, 2008 12:47 PM

ok.. it seems to be working now.. my "problem" was that I wrote the MAC address with capital letters instead of small letters. If I write

MAC_ACTION={ALLOW}

0050569337ad

it works but not for

MAC_ACTION={ALLOW}

0050569337AD

thanks alot,

Jens

Jens

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, January 29, 2008 6:44 PM

Running on Server 2003 R2 x64

When starting the DHCP Server service, I receving:

"The DHCP service has failed to load one or more callout DLLs. The following err occured: %1 is not a valid Win32 application. is not a valid Win32 application. is not a valid Win32 application. is not a valid Win32 application. is not a valid Win32 application. is not a valid Win32 application. is not a valid Win32 application. is not a valid Win32 application. is not a valid Win32 application. is not a valid Win32 application. "

Steve

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, January 31, 2008 10:10 AM

Just wondering what happens regarding existin reservations?

Do the MAC address's for these existing reservations need to be added to the the allowed list or will they just work any?

Matthaus

# re: DHCP Server Callout DLL for MAC Address based filtering @ Saturday, February 02, 2008 1:17 AM

Can you point the callout DLL to a radius server??

David

# re: DHCP Server Callout DLL for MAC Address based filtering @ Sunday, February 03, 2008 2:45 PM

Is  there an option to send request to a radius server instead of a text file??

David

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, February 05, 2008 11:33 AM

Would it be possible to put the source for this callout on www.codeplex.com so that the community can extend it?

Thanks, Scott Pascoe

Scott Pascoe

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, February 14, 2008 6:19 PM

I agree with S.M.

We need to be able to add comments.

Great tool though.

Russel

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, February 15, 2008 9:59 AM

Great tool, I´ve been wondering for a long time why the Windows DHCP-service is so "insecure". Not anymore :)

Jonathan

# re: DHCP Server Callout DLL for MAC Address based filtering @ Monday, February 18, 2008 6:12 AM

to Matthaus:

I think yes. I added these MAC addresses to the allowed list. Otherwise these hosts didn't receive  config from DHCP.

S.M.

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, February 20, 2008 7:22 AM

The Attachment only have the msi file nothing else.

Nreis

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, February 27, 2008 12:15 PM

Does the DHCP server crashes due to wrong MAC format entry in DHCP filter.? I mean I entered o instead of ZERO by mistake.

Pls answer me , saanra@gmail.com

SAANRA

# re: DHCP Server Callout DLL for MAC Address based filtering @ Sunday, March 02, 2008 10:19 AM

On my setup, using deny, I need to have two macs in the maclist.txt file for this to work. When I had only one mac addr listed, it allowed the dhcp server to assign ip anyhow. I added a second mac to the list, unused addr actually, and restarted dhcp. Now it works. Mac address being denied fine. Its funny how the {} brackets are literally needed in the action line for it to work.

Johnny

# re: DHCP Server Callout DLL for MAC Address based filtering @ Monday, March 03, 2008 1:28 PM

Has anyone tried this with a larger environment of approximately 5,000 DHCP clients?  Any performance issues?

Luke

# re: DHCP Server Callout DLL for MAC Address based filtering @ Monday, March 03, 2008 7:03 PM

Hey,

The tool looks great, but somehow i can't get it to work... installed, loaded up the reg settings, rebooted the DCHP... nothing, so i kinda made sure the maclist.txt has error's in it and i notice that also no log files were generated. So it seems like the callout isn't loaded...

DHCP Reg settings: http://img527.imageshack.us/img527/4114/dhcpsettingsqo7.jpg

Hope anyone can help

Daanoz

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, March 04, 2008 3:11 AM

Thx, that helped :) i got an error 1034 saying: The specified module could not be found.

Solution: Changing the "%SystemRoot%" variabele to my hardcoded systemroot (e:/WINDOWS/system32/)

running on:

Windows server 2003 R2

Daanoz

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, March 05, 2008 1:06 PM

I have configured the same way ...it works great.

tn09ac6723

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, March 12, 2008 4:55 AM

Seems to be working. It can be improved, for sure.

As we have to re-start the service everytime when there are changes in the MAClist file, is there any way to make it dynamic.

Regards,

Ajith KUMAR

Ajith KUMAR

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, March 13, 2008 12:22 PM

Hy Raunak

I configured the DLL with this options, but no event 1033 and no error

The dll is under C:\CallOut\MacFilterCallout.dll

In the macfile located C:\CallOut\MacList.txt

MAC_ACTION=ALLOW

008064*

The registry settings are the folowing

CalloutDlls C:\CallOut\MacFilterCallout.dll

CalloutEnabled = 1

CalloutMACAddressListFile = C:\CallOut\MacList.txt

What do I wrong??

Thank`s for your help

Günter

Guenter

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, March 13, 2008 4:34 PM

Excellent tool.

This tool resolved my problems.

Thank You.

Bruno

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, March 14, 2008 2:44 AM

Hy Raunak

thank`s for answer.

I use Windows Server 2003 32bit Standard Edition with SP1 german.

The Server is a Domain Controller

I configured the LogFile in the same path in registry.

HKLM\System\CurrentControlSet\Services\DHCPServer\Parameters

CalloutErrorLogFile = C:\CallOut\error.log

CalloutInfoLogFile = C:\CallOut\infolog.txt

and I change the MacFile to the folling for testing.

MAC_ACTION=ALLOW

00184D33194E

I restart my DHCP Server and nothing.

No LogFile created, no 1033 event

Only the event 7035 (starting DHCP) and 1044 (Authentification DHCP) as information in the eventlog are present.

What goes wrong??

Must I register Calloutdll with regsvr32??

So, we have a lot of Wyse Terminal they are all beginning with 008064, so my additional question is, is it possible to configure CalloutDLL only give this

MAC Segment a DHCP Adress or have I to write all possible adresses to the MacFile???

Thank`s for your help

Günter

Guenter

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, March 14, 2008 7:59 AM

Installed on Win2003 x64.  Get error 1034, The DHCP service has failed to load one or more callout DLLs.   The following error occured:

%1 is not a valid Win32 application.  is not a valid Win32 application. Any solution? Or is it just for x32-systems?

Atle

# re: DHCP Server Callout DLL for MAC Address based filtering @ Sunday, March 23, 2008 4:01 AM

At last I regain control of DHCP lease!

thanks for the tool, one note though; it seems that MAC addresses must be typed using lower case letters, I couldn't get it to work while typing in  CAPITAL!

Zaid

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, March 28, 2008 5:06 AM

Hy Raunak

I can start call-out with the event 1033 in the eventlog, but in error.log the messages

"File format not proper" is insert always I start it.

My MacList.txt File look like this

MAC_ACTION=ALLOW

00184d33194e

What`s going wrong?

Thanks for help

Günter

Günter

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, April 02, 2008 5:49 AM

Hi Guys,

Is there any way to specify multiple mac lists, we intend to put the mac lists in DFS and have all our servers reference it so that we have a central allowed list of machines. It would be nice if you could maintain a mac list per site and have each server load all the site mac list one by one on start.

This is just a bit more manageable than 1 big file.

Tried the following for the CalloutMACAddressListFile Key with no luck.

C:\WINNT\system32\MiltonMAC.txt;C:\WINNT\system32\RiseleyMAC.txt

Thanks

Paul

Paul Wightman

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, April 03, 2008 9:10 PM

Great tool, let me add to the comments from others... ned a simple way to add a comment so we can easily associate mac addresses to users/machines. even if you read the MAC address digits and ignored anything else on the line would be fine

Jim Kirk

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, April 04, 2008 10:42 AM

Hey thanks for the tool. I don't seem to be able to get it working. I have a 2k3 server. I did all the registry entries correct. I have check three times. the DLL seems to log the MAC addresses it has allowed and given DCHP address. Here is my maclist.txt file.

MAC_ACTION={DENY}

***********

***********

I have checked for spaces still nothing. the 1033 message comes up that the DLL has been loaded. not sure what is going on here..

I have Five Registry entires under.

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\DHCPServer\Parameters

CalloutDlls

C:\calloutdll\MacFilterCallout.dll

CalloutEnabled = 1

CalloutErrorLogFile

C:\calloutdll\log.txt

CalloutInfoLogFile

C:\calloutdll\log.txt

CalloutMACAddressListFile

C:\calloutdll\maclist.txt

Path to the DLL is

C:\calloutdll

Log file out put has no errors only list of mac addresses with allow beside it.. Any help would be greatly welcome..

Paul

Paul

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, April 08, 2008 7:36 PM

This tool works great with Windows machines. I recently found that it does not work with Apple Computers. I have the MAC_ACTION set to allow and the maclist contains all MAC addresses I want to allow. Even with Apple computer MAC addresses excluded from the list they still get an ip address from the DHCP server.  Can anyone out there confirm this in their network environment?

tinglima

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, April 15, 2008 5:25 PM

How do you uninstall the filter?

Craggar

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, April 16, 2008 8:34 AM

Raunak

Are there plans to allow this tool to work on Server 2003 R2 x64 ?

Thanks in advance.

Walter Albrecht

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, April 22, 2008 2:16 PM

Is the source code available for this project?

I was going to write something along these lines but with additional custom features for our company and this would be a great starting point for us.

Thanks!

travis

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, April 23, 2008 3:42 AM

I have MAC list file of around 28 MB, there is no issue in configuration everything is perfect, but DHCP Fails to start and throws error 1053, Event Viewer says dll is not loaded due to exception 3221225725

Krishnan

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, April 23, 2008 10:16 AM

Hello there,

Please help me, I'm always having an

"File format not proper" error in my ErrorLogFile.txt. I can see the 1033 in the event veiwer. I have server 2003 installed in VMware workstation.

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\DHCPServer\Parameters

CalloutDlls

C:\callout\MacFilterCallout.dll

CalloutEnabled = 1

CalloutErrorLogFile

C:\callout\ErrorLogFile.txt

CalloutInfoLogFile

C:\callout\InfoLogFile.txt

CalloutMACAddressListFile

C:\callout\MACList.txt

C:\callout

Joe

# Block MAC Address melalui DHCP Server @ Wednesday, April 30, 2008 3:14 AM

Dalam Windows Server 2003 dapat dilaksanakan blocking MAC Address melalui DHCP Server. Seperti kita ketahui

MS Server Tips n Tricks

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, April 30, 2008 8:02 AM

Hi ,

I need to allow only company Mac address will get IP .If some one outsider wants IP from our DHCP server until entering his/her Mac address in to  allow list he /she should not get IP  address from our DHCP server 2003 .

Please help me the script and step by step configuration..

Thanks

Brahma Biswal

Brahma Biketan Biswal

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, April 30, 2008 9:12 AM

Hi ,

I need to allow only company Mac address will get IP .If some one outsider wants IP from our DHCP server until entering his/her Mac address in to  allow list he /she should not get IP  address from our DHCP server 2003 .

Please help me the script and step by step configuration..

Regards

Biswal

dulubiswal

# 1033 from the system event viewer? @ Wednesday, April 30, 2008 2:57 PM

Is the 1033 event in the system event viewer the only indication that the dll is working?  I think everything is placed right but still no message. Using server 2003 SP2.

CalloutDlls  C:\calloutdll\MacFilterCallout.dll

CalloutInfoLogFile C:\calloutdll\infolog.txt

CalloutMACAdressListFile C:\calloutdll\MAClist.txt

Magnus

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, May 01, 2008 9:01 PM

Hi Thanks for this great tool, my question is How can I put comments on each MAC address to esily determine how is the owner.

Ex.

MAC_ACTION={ALLOW}

000b0e99440c (Aries' PC)

000b0e99440d (Guest1's PC)

Thanks

Aries

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, May 02, 2008 5:05 AM

Hi TeamDHCP,

  I have a question,

  I tried to ALLOW a MAC to connect, the PC able to access and get an IP then I removed the MAC address of the same PC (restart DHCP) and retry to connect. The PC can still get an IP address from the DHCP, even the log shows that it was denied.

  Is this due to the IP-MAC lease is still at the DHCP scope or at the DHCP database?

  What sould you do so once you remove the MAC from the list, it will no longer get any IP from the server.

Thanks,

Aries

Aries

# 1033 from the system event viewer? @ Friday, May 02, 2008 12:44 PM

CalloutEnabled  ande set at 1

I have it set but I still see no 1033? I see a 1044?

Am I suppose to look in the System Event viewer?

Magnus

Magnus

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, May 06, 2008 6:34 AM

Its working perfectly now, you are correct no problem in registry, the problem is in the MAC addresses. i change all capital letter to small letter and its work. Thanks for the Tips

Joe

Joe

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, May 06, 2008 6:43 AM

We have 12 subnets and each subnets we have dhcp server. the problem now is most of our user specially in sales and marketing department are shifting from one place to anther. is that possible  that in the registry of the other subnet are pointing to only one dhcp server instead of creating it one by one. as you it is a nightmare for me to add all the mac addresses of all PC's and then restarting again the dhcp server.

Thanks in advance

Joe

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, May 07, 2008 2:02 PM

Is there a way to get the MAC addresses currently in use out of a log file so one doesn't have to hand enter all of the existing clients?

Thanks......

Ken

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, May 14, 2008 3:29 PM

New feature request:

We have a laptop that moves between several subnets (vLANs) within an hour.  We would like to reserve an ip address in each dhcp scope (subnet) for one mac address without manual intervention.  For example,

superscope

scope (172.16.1.0/24):

 reserve ip address 172.16.1.1 for mac address: 0000aaaa1111

scope (172.16.2.0/24):

 reserve ip address 172.16.2.1 for mac address: 0000aaaa1111

...

scope (172.16.n.0/24):

 reserve ip address 172.16.n.1 for mac address: 0000aaaa1111

Currently, Microsoft Windows 2003 SP2 dhcp server allows for entering the same mac address in these scopes, but fails to give the laptop the correct ip address.

Please let me know if this tool could be modified to allow this scenario.  Or if a new tool would be needed.  In either case, when would it be available for general use if at all.

Thank you,

Jeff

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, May 14, 2008 3:38 PM

Ken,

Create a script using the "DOS" command getmac and loop through your ip address ranges (/S ip address)...

GETMAC [/S system [/U username [/P [password]]]] [/FO format] [/NH] [/V]

Description:

This command line tool enables an administrator to display the MAC address for one or more network adapters on a system.

Hope this helps,

Jeff

# DHCP MAC Filtering @ Thursday, May 15, 2008 11:01 AM

Sul blog del team Microsoft che si occupa del servizio DHCP &#232; disponibile una DLL &quot; DHCP Server

ADSide

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, June 04, 2008 9:55 AM

I get an error in my errorlog stating "Could not open the data file"

THe filter file is in the c:\calloutdll directory, the registry matches the file name MAClist.txt and the directory and the file are readable by Admins, SYSTEM, and Users.

Peter M

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, June 11, 2008 12:29 AM

I'm running two scopes on 1 physical dhcp server.two interface running dhcp server,Interface1 is 192.168.10.x and interface2 is 192.168.20.x..Is this tool

possible to implement with this scenario?Thanks!

rayray

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, June 11, 2008 2:21 PM

Is there any workaround to block with statically configured client pc?

how do i know if there are statically configure client in my network? some users

are capable of doing the static ip.

anyway,i got it working flawlessly.

chad

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, June 12, 2008 6:25 PM

Hi team DHCP,

thanks again for this useful tool.i made it work with my two interface dhcp server but there's an issue,those mac address from both interface network are all accepted on the MACList file.I need the two network(192.168.10.x & 192.168.20.x) to be independent to each other.mac address on 10.x should be deny on 20.x network and vice versa.

is this doable?

rayray

rayray

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, June 19, 2008 12:19 PM

Hey DHCP Team,

Great tool!

Question:  How will this work with 802.1x?  If a client fails 802.1x can I add the machine MAC to the list and have it added to a "Guest VLAN" / Subnet?

Thanks

Chris

Chris

# re: DHCP Server Callout DLL for MAC Address based filtering @ Monday, July 14, 2008 5:55 AM

hello

all config for me is correct but it does not run 1033 log

please help me

omid

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, July 16, 2008 4:47 PM

What would happen if a computer was introduced to the network with a proper static configured IP address but the MAC address of this computer was not in the data file of acceptable MAC addresses.

Would the computer still gain access to the network or would there be an IP conflict.  Also what if that IP address being used by the computer in question was already assigned to a viable computer in the network/domain?

Jay Wilcox

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, July 22, 2008 5:55 PM

Vista Business not working!

Works great for XP Pro and Vista Home, but Vista Business Machines never get an IP. Cannot determine the blockage/problem. Anyone?

Richard Brickman

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, July 25, 2008 8:47 AM

I just want to be clear..

If i set a mac address to JUST deny- it will deny that but ALLOW everything else? or do i have to manually put in all MAC addresses in the ALLOW list?

Joe Z

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, July 25, 2008 2:26 PM

I am having the same problem with Vista Buiness.  The macs on those machines are on the allow list but the do not pull a ip address from the DHCP server.

Mike V

Michael VanDusen

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, July 25, 2008 3:51 PM

I just tested this again on Windows XP Pro and it worked fine.  When testing on Windows Vista Business and Enterprise the systems do pull a ip from the DHCP server when using the call dll. It is loaded up fine and there are no filter errors on the server.  Anyone else having this issue.

Mike VanDusen

Michael VanDusen

# re: DHCP Server Callout DLL for MAC Address based filtering @ Friday, July 25, 2008 3:52 PM

Correction to the previous post, the Windows Vista Business and Enterprise do not pull a ip address.

Mike VanDusen

Michael VanDusen

# re: DHCP Server Callout DLL for MAC Address based filtering @ Tuesday, July 29, 2008 1:08 PM

Vista Business Problem

I cannot find a solution for the problem.

I am looking at using the program for blockage to stop someone that does not know the IP range from simply plugging in a foreign computer, exlcuding a range from DHCP, and using that range to statically assign IP's to vista business machines. I still need an allowed range for my VPN Clients. Anyone finding a solution for vista business can email me directly: admin@coloabc.net

Richard Brickman

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, August 06, 2008 2:03 PM

Are there any fixes for Windows Vista Enterprise or Business yet?  This is in reference to the callout dll.

Michael VanDusen

Michael VanDusen

# re: DHCP Server Callout DLL for MAC Address based filtering @ Thursday, August 07, 2008 3:02 PM

Have you developed a version for x64 or is there a date that it will be available?  I received the 1034 event that it's not a valid win32 app.

Brent

# re: DHCP Server Callout DLL for MAC Address based filtering @ Sunday, August 10, 2008 5:43 AM

What is the different between MACFilter and Reservation?

What if someone knows one of the MAC address and change to it, could DHCP server detect it?

JoviLeung

# re: DHCP Server Callout DLL for MAC Address based filtering @ Monday, August 25, 2008 5:21 AM

Hello.

I am trying to use this dll but my W2k3 machine won`t load it. The registry values seem to be corect. The paths also. In event viewer i only get 1044. No 1033 :(

What could be wrong? :(

Help.... please..

Paul

# re: DHCP Server Callout DLL for MAC Address based filtering @ Monday, August 25, 2008 11:39 AM

Any chance there is sample source code perhaps .net source code for this?

Thanks

Austin

# re: DHCP Server Callout DLL for MAC Address based filtering @ Wednesday, August 27, 2008 5:16 AM

By the way, should I stop the DHCP Service first if I need to modify (add or remove entries) from MAClist.txt file?

Jordan

# re: DHCP Server Callout DLL for MAC Address based filtering @ Sunday, August 31, 2008 4:04 AM

I am getting the "is not a valid Win32 application" Event ID 1034 as well and I am running a x32 version of server 2003. Whats wrong?

cbielich