LAN to Internet

Hi,
I read old posts and did not find appropriate solution. Please help,
this is for my school Thank you.

Situation:
___ ADSL Router
|___| DHCP
| IP 192.168.1.2
|
_______________|_____________
|_____________________________| 24x 10/100 switch
| | | | | | |

____ Local server NIC1
| | W2K Adv.Server SP4 IP 192.168.1.1
|____| DC, AD, DNS DGW 192.168.1.2 (ADSL Router)
DNS Forwarder DNS 192.168.1.1
-->193.198.184.130
(ISP)

___ ___ ___ ___ __
Win XP Prof SP2 |___| |___| |___|...|___|.. |__| laptops
IP st. 192.168.1 .101 .102 .103 .120 dhcp
DGW 192.168.1.2 (adsl router)
DNS 192.168.1.1 (local server)


Problem:
- new ISP --> new ADSL DHCP router (IP 10.144.16.1)
[--> 193.19.114.4 for outside world]
- not permited to change anything on new router

Questions:
- how to connect my LAN to internet now?
- install another nic (NIC2) and RRAS+NAT (configuration?) on local
server?
- wich changes need to make on each device?
- do not want any outside computer to connect to my lan

You need to change the IP addresses of your LAN machines so that they are
in the same IP subnet as the router, which is your Internet gateway. Before,
your gateway was in the 192.168.1 subnet so your LAN machines had to be in
that subnet. If your gateway is now in 10.144.16 then all of your machines
will need to be in that subnet instead.

You can't do this if you can't change anything on the router. The router
DHCP will not hand out the correct DNS and DHCP addresses. If you can
disable DHCP on the router, you can run DHCP on your server to give clients
the correct settings. They will need to use the router's private IP address
as the gateway and the server's IP address for DNS.

Internet
router
10.144.16.1
|
server (static IP)
10.144.16.2
|
workstations (DHCP from server)
10.144.16.x dg 10.144.16.1 DNS 10.144.16.2

Installing RRAS on a DC is not a good idea. It will cause you all sorts of
odd problems. If you really want to keep the LAN on 192.168.1 you will
neeed a router between 192.168.1 and 10.144.16 but the DC as a router is
not the way to do it.

<(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
> Hi,
> I read old posts and did not find appropriate solution. Please help,
> this is for my school Thank you.
>
> Situation:
> ___ ADSL Router
> |___| DHCP
> | IP 192.168.1.2
> |
> _______________|_____________
> |_____________________________| 24x 10/100 switch
> | | | | | | |
>
> ____ Local server NIC1
> | | W2K Adv.Server SP4 IP 192.168.1.1
> |____| DC, AD, DNS DGW 192.168.1.2 (ADSL Router)
> DNS Forwarder DNS 192.168.1.1
> -->193.198.184.130
> (ISP)
>
> ___ ___ ___ ___ __
> Win XP Prof SP2 |___| |___| |___|...|___|.. |__| laptops
> IP st. 192.168.1 .101 .102 .103 .120 dhcp
> DGW 192.168.1.2 (adsl router)
> DNS 192.168.1.1 (local server)
>
>
> Problem:
> - new ISP --> new ADSL DHCP router (IP 10.144.16.1)
> [--> 193.19.114.4 for outside world]
> - not permited to change anything on new router
>
> Questions:
> - how to connect my LAN to internet now?
> - install another nic (NIC2) and RRAS+NAT (configuration?) on local
> server?
> - wich changes need to make on each device?
> - do not want any outside computer to connect to my lan
>

On this new router will connect many others computers from others
classrooms.
I want to keep my lan out of them and vice versa.
My lan only need our local enviroment and Internet.
I still have my old ADSL router (192.168.1.2).
Then could use it for "interface" between my lan and that 10.144.16
router?
I could connect my switch to old router and old router to new one?
And somehow tell them to talk to each other.
I'll read the old-router-manual to find it out.
Thank you for quick answer

What is providing addresses to your clients?
DHCP from the router?
DHCP from the server?
Manually configured?

Depending on the configuration, you have several choices. If the new router
is forcing you to use a 10.x.x.x network and you want to keep the
192.168.x.x network setup, you *could* use the old router to connect the two
networks if it has two ethernet interfaces. Another option is to install
routing on the Windows 2003 server and use a second NIC card on this server.
Connect one NIC to the 10.x.x.x network and the other to the 192.168.x.x
network, and the server will route between them.

As Bill Grant indicated, probably the simplest solution is to switch your
server to use a 10.x.x.x address and provide 10.x.x.x addresses to all your
client computers. If these addresses are provided by your server, then you
will need to add a new DHCP scope. If they are provided by the router, you
shouldn't have a problem. If they were provided by your old router but the
new router isn't running DHCP, then you will need to add DHCP support on
your network or configure the clients with manual IP addresses in the
10.x.x.x range.

--
Greg Lindsay [MSFT]

Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.

<(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
> On this new router will connect many others computers from others
> classrooms.
> I want to keep my lan out of them and vice versa.
> My lan only need our local enviroment and Internet.
> I still have my old ADSL router (192.168.1.2).
> Then could use it for "interface" between my lan and that 10.144.16
> router?
> I could connect my switch to old router and old router to new one?
> And somehow tell them to talk to each other.
> I'll read the old-router-manual to find it out.
> Thank you for quick answer
>

(E-Mail Removed) wrote in news:1176809602.365126.131660
@e65g2000hsc.googlegroups.com:

> I still have my old ADSL router (192.168.1.2).
> Then could use it for "interface" between my lan and that 10.144.16
> router?
> I could connect my switch to old router and old router to new one?
> And somehow tell them to talk to each other.
> I'll read the old-router-manual to find it out.

That should work fine. Use the two routers "in series", with the old
router's "outside" connection wired to the new router's "inside"
connection. Tell the old router to use DHCP to get its outside address and
DNS settings (if you use external DNS or forwarding).

So you'd have:

Internet --- New router --- Old router --- LAN

I did it! It works!

Internet
|
New 10.16.144.1 router DHCP
|
wan-side: dynamic IP (10.16.144.x) & automatic DNS (193.198.x.x)
old router
lan-side: static 192.168.1.2
|
LAN PC's
static IP 192.168.1.x
dg 192.168.1.2
dns: local server 192.168.1.1 and ISP's dns
(to all PC's I had to add ISP's dns address 193.198.x.x)