[147] in winnt
Re: Question: RAS PPTP access to MIT from MediaOne?
daemon@ATHENA.MIT.EDU (Tom Fitzgerald)
Fri May 15 10:29:46 1998
To: Nathanial Charles <garlands@MIT.EDU>
Cc: ntpartners@MIT.EDU
In-Reply-To: Your message of "Fri, 15 May 1998 10:06:10 EDT."
<3.0.2.32.19980515100610.01358de0@hesiod>
Date: Fri, 15 May 1998 10:29:40 EDT
From: Tom Fitzgerald <tfitz@MIT.EDU>
> In practice, what happens is that I can connect to the Windows NT Server
> using PPTP, but once I am connected, nothing happens. I can not browse
> network neighborhood. I can't see any computers on the subnet that I am
> supposedly connected to. I can not do a find computer either by name or IP
> address. I am getting an IP address on the remote subnet via DHCP, but
> while I am connected, the only IP addresses that I can ping are the remote
> WinNT server address and my own remote subnet IP address. All other pings,
> to known subnet IP addresses, or even to general internet sites return
> failures.
It sounds like the server has routing disabled. Peek at the
Network Neighborhood/Properties/Protocols/TCPIP/Properties/Routing form on
the server, there's a checkbox for "Enable IP forwarding" that should be
checked. This is necessary for the server to forward packets between its
LAN interface and PPTP pseudo-interface.
> Does anyone else connect remotely from MediaOne? I suspect that there is
> some routing issue here, since the routing table changes when I make the
> PPTP connection, but I don't know how to interpret the tables correctly.
This is normal.... I believe that while the PPTP link is up, your PC's
default route will point to it, so *all* your internet traffic will go
via the PPTP path. To change this you'd have to get a command prompt
and start messing with "route delete" and "route add" commands, which
I've never done on NT and can't even speculate on. If you're feeling
adventurous, what you need is for the default route to be configured
back to the LAN interface (the address you get from media one), and the
route to 18.0.0.0 pointing to the PPTP interface.
To REALLY test this, you need to have the PPTP link up while trying to
ping your home machine from a system at MIT. You can snoop the network
packets using a sparcstation, and find out how far in the handshake
things are getting. If this is an option, let me know....
