RRAS/PPTP - Can't see Internet
Scot Desort
- NT4 SP3, RRAS and all hotfixes applied. Server is PDC with a single
Ethernet card which connects to the Internet (no proxy or anything else in
between)
- Microcom ISPPorte modem rack with PRI
The Microcom has the ability to identify an inbound ISDN call and route it
to a PPTP server, which is the server referenced above. I have RRAS
configured to pull an IP address from our DHCP server, which resides on
another NT box in a different NT domain. All IP addresses (the NIC and the
DHCP pool) are in the same subnet.
I can establish an ISDN connection successfully. I am assigned an IP address
from the pool. But I cannot even ping the NT box which established the PPTP
session. Everything times out. In reading the RRAS docs, it mentions
something about requiring the RAS-assigned IP and the NIC IP to be on
different subnets. Years ago when I used RAS for dialin Internet users, I
never remember this being required.
Anyway, does anyone have any idea what I am doing wrong? It does not appear
that the problem lies in the Microcom, or it's ability to establish the PPTP
connection to the NT box. Something else is going wrong once RRAS gets the
packet. I didn't think I needed to do any "routing" on the NT box, since
everything is on the same subnet. I should *at least* be able to ping
Ethernet card of the NT box while dialed in.
Hints, ideas, shots in the dark????
P.S. - One side note -- the only way I could authenticate the dialin session
to RRAS was to use Windows NT for authentication. I use the Microsoft
IAS/RADIUS snap-in for IIS4, and the remote client would not authenticate to
it. IIS RADIUS would always reject the login. The same user/password
combination coming into the Microcom directly to a v.90 modem authenticates
to the same RADIUS server without a problem.
...Scot
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