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Realise DMZ with one ISA-Server

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Realise DMZ with one ISA-Server - 9.Sep.2009 3:46:10 PM   
ZeroCool

 

Posts: 4
Joined: 9.Sep.2009
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Hello!

I'm quite new to ISA-Server, I have one as just a Firewall between internal and external.

Now I tried to realise a DMZ with ISA, but I won't get it running correctly. My Main-Problem is that I can't connect from internal to DMZ with RDP.

On the ISA I have 3 NICs (Internal, External, DMZ) and for each NIC a Network configured on ISA (Internal-->Internal,External-->External, DMZ-->DMZ). I have activated Routing between Internal and DMZ. And created a Rule to allow RDP between Internal and DMZ.

Now when I try to connect with RDP I see in ISALog one Initialized Connection and some seconds later, disconnected Conntection. Nothing else between the two entries.

So RDP-Connection is not established, can someone tell me where the problem is or is it just impossible?

I'm sorry if I forgot some important infos, or I wrote too complex.


Thx for your help
ZeroCool

< Message edited by ZeroCool -- 10.Sep.2009 5:39:50 AM >
Post #: 1
RE: Realise DMZ with one ISA-Server - 11.Sep.2009 2:39:46 PM   
aek033

 

Posts: 42
Joined: 19.Sep.2006
Status: offline
Have you allowed RDP from internal to local host (isa server)?

(in reply to ZeroCool)
Post #: 2
RE: Realise DMZ with one ISA-Server - 12.Sep.2009 6:05:51 AM   
ZeroCool

 

Posts: 4
Joined: 9.Sep.2009
Status: offline
I wanted to avoid this, but I'll give a try.

(in reply to aek033)
Post #: 3
RE: Realise DMZ with one ISA-Server - 12.Sep.2009 1:30:28 PM   
DEVLAVI

 

Posts: 115
Joined: 16.Jul.2009
From: Bangalore, India
Status: offline
quote:

ORIGINAL: aek033

Have you allowed RDP from internal to local host (isa server)?


Needless! What purpose does that serve?

Thanks,
Dev

_____________________________

Vasu Dev,
Network Administrator

"Abnormal is so common, it's practically normal."

(in reply to aek033)
Post #: 4
RE: Realise DMZ with one ISA-Server - 12.Sep.2009 1:43:06 PM   
ZeroCool

 

Posts: 4
Joined: 9.Sep.2009
Status: offline
I also thought this

but do u have another solution for me? should I create just a set of computer or a Adressrange? with a range for internal network and a range for the dmz, so I can expand the preconfigured internal network with the dmz.

But i don't think this is than a real DMZ?

thanks

(in reply to DEVLAVI)
Post #: 5
RE: Realise DMZ with one ISA-Server - 12.Sep.2009 11:08:26 PM   
DEVLAVI

 

Posts: 115
Joined: 16.Jul.2009
From: Bangalore, India
Status: offline
Hi
I assume that you have Enabled RDP on the server in question

If you have multiple NIC on the server in the DMZ, Make sure it is set to Listen for RDP on the Appropriate NIC instead of All NIC's
Go to Run-> tscc.msc -> RDP-Tcp Properities & navigate to Network Adapter Tab


HTH,
Dev

_____________________________

Vasu Dev,
Network Administrator

"Abnormal is so common, it's practically normal."

(in reply to ZeroCool)
Post #: 6
RE: Realise DMZ with one ISA-Server - 13.Sep.2009 9:52:47 AM   
ZeroCool

 

Posts: 4
Joined: 9.Sep.2009
Status: offline
On the DMZ I have just one NIC.

I can connect with RDP from internal to ISA and from ISA to DMZ, so I think there is a routing issue on whole ISA or just in RDP. And the strange thing is, I can see a Connection Initialised and then a Connection Disconnected entry in the log.

(in reply to DEVLAVI)
Post #: 7

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