Re: 2 NICs + Site-to-Site VPN + Http proxy = problem

From: Phillip Windell (_at_.)
Date: 07/29/04 

Date: Thu, 29 Jul 2004 15:46:39 -0500

The Proxy's LAT must contain the address range of the remote network LAN
that is at the other end of the VPN just as it contains the address range of
your local LAN.

You indicated this server runs NAT,...in this case the NAT service would
also have a LAT of some form somewhere and you need to include the remote
address range in it the same way as the proxy. 

-- 
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
"Guillaume Tamisier" <nospam@nospam.com> wrote in message
news:OqQmPZadEHA.1184@TK2MSFTNGP11.phx.gbl...
> Hi,
>
> I have a strange problem on one of the computers of my company. It is a
> Windows Server 2003 Domain Controler with 2 network cards (one public,
which
> does NAT, and a private one). The network requires a proxy to access the
> web. This proxy is behind the public network interface. When I launch
> Internet Explorer, it asks for the login/password for the proxy and I can
> access the web without any problem.
>
> Yesterday, I configured a Site-to-Site VPN connection between this
computer
> and another computer on the internet. When the VPN connection is
connected,
> IE no more uses the proxy and the computer have no access to the web !!! I
> used a sniffer to understand where is the problem, and I noticed that when
> the VPN is connected, IE no more forwards Http requests to the proxy, but
> directly to the gateway of the public network card. If I disconnect the
VPN
> connection, everything works fine again.
>
> I checked the routing table of the computer when the VPN connection is on,
> and the table is good. The gateway is still the gateway of the public
> network card, so it's not a route problem. I just don't understand why IE
> suddenly no more forwards Http requests to the proxy.
>
> Any idea about this problem ?
>
> -- 
> Guillaume Tamisier
> ALIANTIZ
>
>

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