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DHCP Problem after Installation of Firewall Client - 5.Dec.2007 3:31:31 AM

Tafkadasoh

Posts: 5
Joined: 5.Dec.2007
Status: offline

Hi,

I've got a Isa Server 2006 installed (with activated Proxy), a Windows SBS 2003 R2 as Domain Controller, and the Clients are running on Windows XP SP2 and are member of the domain.

When I install the Firewall Client on a Client computer, the computer looses the network connectivity. Usually it get's an IP-adress from the 192.168.62.xxx net, but after installation of the Firewall Client the DHCP fails, and the client gets a 169.254.xxx.xxx adress and the network symbol in the tray says "Limited or no Connectivity"

If I deinstall the Firewall Client, the Computer immediately get's a correct ip-adress from the .62 subnet.

Has anybody an idea, what's the problem? Thanks in advance!

Surprisingly enough, I had no problems with the firewall client on my laptop, which is also in the .62 net, but not a member of the domain.

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RE: DHCP Problem after Installation of Firewall Client - 11.Dec.2007 4:32:49 PM

Tafkadasoh

Posts: 5
Joined: 5.Dec.2007
Status: offline

Has really noone just any idea or ideas for failure analysis? This would be great, thanks in advance.

(in reply to Tafkadasoh)

Post #: 2

RE: DHCP Problem after Installation of Firewall Client - 14.Dec.2007 11:09:27 AM

elmajdal

Posts: 5061
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline

Yah, I have never heard of such an issue with the Firewall Client.

Is this on all your clients ?

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to Tafkadasoh)

Post #: 3

RE: DHCP Problem after Installation of Firewall Client - 17.Dec.2007 7:38:14 AM

Tafkadasoh

Posts: 5
Joined: 5.Dec.2007
Status: offline

Yeah, unfortunately. I tested it on several (not all) clients which are member of the domain, and on each I got the same error. Just on one machine outside the domain, it worked well. Till now I had no chance to test it on another computer outside the domain, regrettably.

(in reply to elmajdal)

Post #: 4

RE: DHCP Problem after Installation of Firewall Client - 9.Jan.2008 7:46:18 AM

Tafkadasoh

Posts: 5
Joined: 5.Dec.2007
Status: offline

Today I tested the FW-Client installation again on a fresh installed XP SP2 machine. The machine joined the domain, and suprisingly the Firewall client worked well though.
But when I finally installed the anti virus software "Avira Antivir Workstation", the firewall client wasn't been able to connect to the isa server anymore.

How can that be?

(in reply to Tafkadasoh)

Post #: 5

RE: DHCP Problem after Installation of Firewall Client - 9.Jan.2008 10:07:16 AM

elmajdal

Posts: 5061
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline

mmm, i have seen this with Nod32 Antivirus as well.

there is for sure an option in the antivirus that will consider Firewall Client a safe application. There is such option in Nod32 and that was the way to unblock Firewall Client.

HTH,
Tarek

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to Tafkadasoh)

Post #: 6

RE: DHCP Problem after Installation of Firewall Client - 14.Jan.2008 5:39:16 AM

Tafkadasoh

Posts: 5
Joined: 5.Dec.2007
Status: offline

Hmmm.... I searched for such an option, but I just found two possibilities which each didn't resolve the problem:

1) I configured the Antivir Guard program (which runs as a process in the background to search for viruses in running programs, when accessing files etc.) so, that the FwcAgent.exe and FwcMgmt.exe are entered under "process exceptions"

2) I deactivated all options at the "extended danger categories", like blocking spyware, adaware, backdoor programs, etc.

I couldn't find other options such as a list of blocked processes/programs, where I could unblock the FWC.

I also configured the FwcAgent.exe as an exception in the Windows Firewall, without success.

Do you know more details, for what configuration options I should look in my Antivir?

Another thing: Again I get problems with the net as long as the FWC is installed (just as described in the first post.) When the FWC is installed and I try to get a new IP via "ipconfig /renew" then I get the following (german) error message:

"Beim Aktualisieren der Schnittstelle "LAN-Verbindung" ist folgender Fehler aufgetreten: Ein Vorgang bezog sich auf ein Objekt, das kein Socket ist."

translated it means

"The following error occured when refreshing the interface "LAN-Connection": An operation refered to an object, which is not a socket."

Anyone a clue?

Thanks in advance,
Martin

< Message edited by Tafkadasoh -- 14.Jan.2008 5:46:52 AM >

(in reply to elmajdal)

Post #: 7