Internet Access via an ICS Machine

  • Thread starter Thread starter Jonathan Pembury
  • Start date Start date
J

Jonathan Pembury

Hi everyone,

I'm quite new to windows networking, so any help that you
can give me will be very much appreciated.

I'm trying to provide internet access to a small group of
client computers connected to a Windows 2000 Advanced
Server Active Directory Domain Controller via another
computer that is running Windows XP ICS.

The basic topology is as follows:


INTERNET
|
|
[ICS Computer, ADSL in the UK]
IP Address : 192.168.0.1
Subnet Mask: 255.255.255.0
|
|
[Windows 2000 Advanced Server, AD DC]
NIC2 : 192.168.0.2
Subnet Mask: 255.255.255.0

NIC1 : 192.168.1.1
Subnet Mask: 255.255.255.0
|
|
[Hub/Switch]
|
|
[Client Computers]
IP Address : 192.168.1.x
Subnet Mask: 255.255.255.0

where 1<x<255


I have left the Default Gateways out as I'm hoping someone
can clarify what they are supposed to be.

Please be verbose as possible in describing how to make
this setup work.

Thanks in advance.


Jonathan
 
There are a number of problems with this setup.

1. You should not be using ICS in a domain setup. Active Directory
requires that the clients use the local DNS service. ICS proxies DNS
requests to your ISP.
2. ICS will not work across the router. You would need to also run NAT
on the server and do address translation twice!

What is between the Internet and the ICS machine? Does the ICS machine
have the ADSL modem directly connected?

You could solve the problem by using your server as the Internet router and
running RRAS/NAT on it (if RRAS would recognise your ADSL modem). But I
would be inclined to put in a hardware router instead of the ICS machine.

You would then set things up with the server as the default gateway of
the LAN. The domain controller would run DNS and have a forwarder set up to
the DNS server at your ISP. eg

Internet
|
public IP
NAT router
192.168.0.1
|
192.168.0.2 dg 192.168.0.1
W2k
192.168.1.1 dg blank
|
clients
192.168.1.x dg 192.168.1.1
 
Top fellow! You've correctly identified my problem - namely
that the AccessRunner PPP over ATM ADSL modem isn't
properly supported under Windows 2000 Server, and hence the
requirement of the ICS computer (with the modem directly
connected to it).

Unfortunately, I don't have a hardware router at hand, so I
can't pursue the solution that you suggested.

I was running a linux server to provide my clients with
internet access using IP Masquerading (aka NAT).

The switch from linux to windows was necessary because some
services that were required by the clients were not
available or fully compatible with the linux server
machine.

I appreciate, and thank you very much for your efforts.

Cheers Bill.


Jonathan.

-----Original Message-----
There are a number of problems with this setup.

1. You should not be using ICS in a domain setup. Active Directory
requires that the clients use the local DNS service. ICS proxies DNS
requests to your ISP.
2. ICS will not work across the router. You would need to also run NAT
on the server and do address translation twice!

What is between the Internet and the ICS machine? Does the ICS machine
have the ADSL modem directly connected?

You could solve the problem by using your server as the Internet router and
running RRAS/NAT on it (if RRAS would recognise your ADSL modem). But I
would be inclined to put in a hardware router instead of the ICS machine.

You would then set things up with the server as the default gateway of
the LAN. The domain controller would run DNS and have a forwarder set up to
the DNS server at your ISP. eg

Internet
|
public IP
NAT router
192.168.0.1
|
192.168.0.2 dg 192.168.0.1
W2k
192.168.1.1 dg blank
|
clients
192.168.1.x dg 192.168.1.1


Hi everyone,

I'm quite new to windows networking, so any help that you
can give me will be very much appreciated.

I'm trying to provide internet access to a small group of
client computers connected to a Windows 2000 Advanced
Server Active Directory Domain Controller via another
computer that is running Windows XP ICS.

The basic topology is as follows:


INTERNET
|
|
[ICS Computer, ADSL in the UK]
IP Address : 192.168.0.1
Subnet Mask: 255.255.255.0
|
|
[Windows 2000 Advanced Server, AD DC]
NIC2 : 192.168.0.2
Subnet Mask: 255.255.255.0

NIC1 : 192.168.1.1
Subnet Mask: 255.255.255.0
|
|
[Hub/Switch]
|
|
[Client Computers]
IP Address : 192.168.1.x
Subnet Mask: 255.255.255.0

where 1<x<255


I have left the Default Gateways out as I'm hoping someone
can clarify what they are supposed to be.

Please be verbose as possible in describing how to make
this setup work.

Thanks in advance.


Jonathan
Click to expand...


.
Click to expand...
 
You could try using a Linux machine doing IP masquerading (rather than XP
with ICS) in place of the hardware router I suggested. The important thing
is to use your server as the default gateway of the LAN and have your LAN
clients use the local DNS server, and have the server's "public" interface
connected to the Internet router.

Jonathan Pembury said:
Top fellow! You've correctly identified my problem - namely
that the AccessRunner PPP over ATM ADSL modem isn't
properly supported under Windows 2000 Server, and hence the
requirement of the ICS computer (with the modem directly
connected to it).

Unfortunately, I don't have a hardware router at hand, so I
can't pursue the solution that you suggested.

I was running a linux server to provide my clients with
internet access using IP Masquerading (aka NAT).

The switch from linux to windows was necessary because some
services that were required by the clients were not
available or fully compatible with the linux server
machine.

I appreciate, and thank you very much for your efforts.

Cheers Bill.


Jonathan.

-----Original Message-----
There are a number of problems with this setup.

1. You should not be using ICS in a domain setup. Active Directory
requires that the clients use the local DNS service. ICS proxies DNS
requests to your ISP.
2. ICS will not work across the router. You would need to also run NAT
on the server and do address translation twice!

What is between the Internet and the ICS machine? Does the ICS machine
have the ADSL modem directly connected?

You could solve the problem by using your server as the Internet router and
running RRAS/NAT on it (if RRAS would recognise your ADSL modem). But I
would be inclined to put in a hardware router instead of the ICS machine.

You would then set things up with the server as the default gateway of
the LAN. The domain controller would run DNS and have a forwarder set up to
the DNS server at your ISP. eg

Internet
|
public IP
NAT router
192.168.0.1
|
192.168.0.2 dg 192.168.0.1
W2k
192.168.1.1 dg blank
|
clients
192.168.1.x dg 192.168.1.1


Hi everyone,

I'm quite new to windows networking, so any help that you
can give me will be very much appreciated.

I'm trying to provide internet access to a small group of
client computers connected to a Windows 2000 Advanced
Server Active Directory Domain Controller via another
computer that is running Windows XP ICS.

The basic topology is as follows:


INTERNET
|
|
[ICS Computer, ADSL in the UK]
IP Address : 192.168.0.1
Subnet Mask: 255.255.255.0
|
|
[Windows 2000 Advanced Server, AD DC]
NIC2 : 192.168.0.2
Subnet Mask: 255.255.255.0

NIC1 : 192.168.1.1
Subnet Mask: 255.255.255.0
|
|
[Hub/Switch]
|
|
[Client Computers]
IP Address : 192.168.1.x
Subnet Mask: 255.255.255.0

where 1<x<255


I have left the Default Gateways out as I'm hoping someone
can clarify what they are supposed to be.

Please be verbose as possible in describing how to make
this setup work.

Thanks in advance.


Jonathan
Click to expand...


.
Click to expand...
Click to expand...
 
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