Re: setup of NT sub-ISP

Juergen Weiss ( (no email) )
Mon, 8 Dec 1997 14:28:25 +0100

If he is running wingate there is no need to give him IPs at all. Within =
LAN he uses private addresses (192.168.*.*) . Wingate dials to your servi=
and makes the address translation from the private addresses to the one I=
of the DUN. As you know wingate handles also "normal" dynamic assigned IP=
This means that you can give him a standard dial in account. Also you hav=
to spent some time in configuring wingate (myself I spent alot).
This configuration won't work if he likes to run his own webserver (with
registered IPs) or anything else. I made this configuration for a custome=
with about 20 PCs (no RAS server) and I think it should also work with RA=

-----Urspr=FCngliche Nachricht-----
Von: Clara Hatem <>
An: <>
Datum: Sonntag, 7. Dezember 1997 22:44
Betreff: setup of NT sub-ISP

>I will start by specifying that I am working for a Solaris based ISP, so
>therefore I thought I could get help from you ,(NT ISPs), in the setup
>of an NT sub-ISP for one of my clients.
>That client now has the following setup:
>NT 4.0 server running mdaemon server for mail and wingate as proxy.
>That client also has Routing and Ras server running on that server, and
>accepts dial-in connections on 12 modems.
>he provides the internet connection to these dial-in connections, by
>dialing out to our services (DUN of NT 4.0), where he is assigned a
>static IP u.v.w.178.
>we also provided him with a subnet of 16 IPs x.y.z.80.
>The x.y.z.81 is assigned to the server. the modems are served from a
>pool (the rest of
>the subnet)
>this subnet is routed (in our routing tables) thru the static IP
>Now that client bought a cisco 1005 router, and will be connected to our
>services thru a microwave link. The modem (cisco 1005), boots from a
>TFTP server (installed on the NT 4.0 server)
>later on, that client will extend the Internet access also to his local
>I am wondering on the configuration that should be done after
>installation of the cisco router. I planned the setup as follows, please
>add or rectify :
>1- assign another subnet of 16, e.g s.r.t.80 , for the LAN.
>assign for example s.r.t.81 for the NT server ethernet, and s.r.t.82 for
>the cisco ethernet port.
>2- on the NT server, enable IP forwarding (in order to have all the
>dial-in connections routed to the ethernet of the server, and from there
>to the router ethernet, than to the router serial port which is linked
>to our services).
>3- on the NT server, also specify s.r.t.82 (ethernet of cisco router) as
>a TCP/IP gateway in network/protocols/TCPIP gateway.
>3- in our routing tables, change routing of subnet x.y.z.80 to have the
>x.y.z.81 IP (NT server) as a gateway.( or isn't it necessary ???)
>4- on the LAN PCs, specify s.r.t.82 as a TCP/IP gateway.
>5- what should be the TCP/IP gateway address for the clients dialing
>into the NT server ??? x.y.z.81 ??
>are there any static routes that should be added on the NT server ???
>Please advise on the best setup.
>thank you,
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