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'[PICLIST] [OT] Browsing two web servers on the sam'
2000\11\10@023744 by John Waters

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Hi All,

I have a LAN that is made up by a NT Server + a few
Win98 workstations. The NT Server has been configured
with its built-in Web Server, IIS, enabled. The Server
machine is connected to a router that links with the
infrastructure provider. I can access the IIS of the
NT machine, by using a browser anywhere in the world.
I have recently installed to one of the Win 98
workstation the "Personal Web Server", however, I
found that it is accessable only by machines connected
to the LAN, but not by one from the internet. Is there
any way I can make it responds to external internet
browsing like what the IIS Server is doing (the IIS
should be working too, of course)?Thanks in advance!

John



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2000\11\10@090950 by M. Adam Davis

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You haven't told us enough wbout your setup.  Is your machine connected to
the internet through the server(proxy or firewall possibility), a router
(NAT possibility), or what?  What kind of internet connection do you have
(Dial-up, ISDN, cable-modem, ADSL, T1, etc)?

Is this lan administered by you or someone else?

-Adam

John Waters wrote:
{Quote hidden}

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2000\11\10@093658 by Alok Dubey (OCS-BLRRO-AVS)

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Hi John

M Adam Davis.. u dont need to know a thing about his LAN..
your web serer on the WIN NT was on an internet IP or had a NAT which poped
it on the net as a valid IP..
change tihe 98 IP to the WIN NT ip and the rest  will happen

Alok Dubey
Network/Systems Architect
Wipro Infotech Ltd.


> {Original Message removed}

2000\11\10@103331 by M. Adam Davis

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It sounds like he wanted to access both machines from the internet, not
one or the other.  If he only wanted to access his win98, and not the NT,
then you are correct, he could switch IP addresses (which could be
difficult or easy depending on how they have their network set up (DHCP,
etc).

If he has only one external IP address, and a NAT, he could redirect
another port to his computer (instead of "0.0.0.0" in the browser window
(which defaults to port 80) you would do "0.0.0.0:xx" where xx is the
port)

If all the computers have their own external IP address, he just needs to
make sure there isn't a firewall blocking incoming connection requests.

If he is using a proxy server (not NAT) then it can be much more involved.

So, you are correct in saying that if he wanted to use one and not the
other, he could swap IPs.  But the extra information is needed to get both
machines on the internet simultaneously.

-Adam

"Alok Dubey (OCS-BLRRO-AVS)" wrote:
{Quote hidden}

> > {Original Message removed}

2000\11\10@121858 by Lindsay Pallickal

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   Judging by his hostname, ipvpn008018.netvigator.com, he could be
bringing in a VPN(links two LANs transparently over an internet connection -
for non-network people). I went to netvigator.com to see what services they
offer but it's all in Chinese. In this case, net access for his internal
hosts would all depend on the network to which he is linking. He did mention
he is using a router to that links him to an "infrastructure provider."
Sounds like a third party set up the VPN and is describing it using
market-speak. The network on the other side of the VPN, where he likely gets
his internal ip addresses, could be running NAT, a proxy, or have a
firewall. There could be a few layers to tunnel through to get a real net
connection to that 98 box, very difficult without permission from whoever
the admin is. He could always tunnel through DNS using a third party host as
a server. That's getting a little crazy(and neat!), but only Linux can do it
at the moment. We certainly do need a lot more information before offering
any suggestions though, else all we're left to is crazy speculation. John?

Lindsay
----- Original Message -----
From: "M. Adam Davis" <spam_OUTadavisTakeThisOuTspamUBASICS.COM>
To: <.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU>
Sent: Friday, November 10, 2000 10:32 AM
Subject: Re: [OT] Browsing two web servers on the same LAN, how?


{Quote hidden}

poped
> > it on the net as a valid IP..
> > change tihe 98 IP to the WIN NT ip and the rest  will happen
> >
> > Alok Dubey
> > Network/Systems Architect
> > Wipro Infotech Ltd.
> >
> > > {Original Message removed}

2000\11\10@193300 by John Waters

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>We certainly do need a lot more information before offering
>any suggestions though, else all we're left to is crazy speculation. John?
>
>Lindsay


Actually I know very little about the configuration of the LAN using in the
office, I'm just a consultant doing a project for them and the network
administrator is not too willing to modify too much just for my project, or
not even want to tell me as an outsider too much about their configuration.

Anyway, in my project I have another web server on the LAN running in
parallel with the main NT server, there is a home page in my server which I
want to be accessible from outside the building. Right now I can go up the
internet from my machine, but couldn't call in from outside even the web
server program is accessible from another machine within the same building.
But I know the LAN is well protected by a proxy server since it has over a
hundred workstations connected to it.


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2000\11\12@175054 by Tom Brandon

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Sounds like they might be using MS Proxy Server. If you check in Internet
Explorer\Netscape Navigator for Proxy settings that should tell you
(likewise checking your IP address can help but it is possible to use
Internet valid IP's inside a firewall, just bad practice) if there's proxy.
You'd have to check the NT server to see if it's MS Proxy.

If they've got a MS Proxy (or another proxy?) you should be able to set up
Reverse Proxying. You can either:
1) Assign another valid external IP to the NT box and reverse proxy it to
your internal address
2) Use another port on the existing IP (I think you can do this)

If you use 2 then the web server will be existinghost.domain.com:81 or
something (i.e. you'll need to use a port, but should be fine at least for
testing.

Tom.

{Original Message removed}

2000\11\13@001053 by Alok Dubey (OCS-BLRRO-AVS)

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Hi,

obviously the Web server cant be on DHCp. would be ridiculous to NAT with
MAC adddr..
if all are on valid ip , hen too it will work.. i doubt he wants 2 web
servers.. if he does ur right :-)
alok


> {Original Message removed}

2000\11\13@105132 by M. Adam Davis

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Actually, there are some very good reasons to DHCP servers, and every
other computer in any large organization.  At any rate, you aren't doing
NAT with the MAC address.  Often you have a firwall (or proxy) which
translates the requests anyway, so changing the IP on the way (assigned by
DHCP) is not an issue, and furthermore increases the effectiveness of the
firewall.

But it is not common...

-Adam

"Alok Dubey (OCS-BLRRO-AVS)" wrote:
>
> Hi,
>
> obviously the Web server cant be on DHCp. would be ridiculous to NAT with
> MAC adddr..
> if all are on valid ip , hen too it will work.. i doubt he wants 2 web
> servers.. if he does ur right :-)
> alok
>
> > {Original Message removed}

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