DSL NAT and VPN

  • From: Amy Babinchak <amy@xxxxxxxxxxxxxxxxxxxxxxxxxx>
  • To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
  • Date: Mon, 10 Jun 2002 16:07:17 -0400


Amy Babinchak
Technology Consultant


I have a pretty typical small business setup. We have a DSL router that
is configured to assign the SBS server a NAT address of 192.168.1.100.
This is our "external" NIC. The internal NIC is 10.0.0.4. 

I am trying to allow client computers to connect to the server using
VPN. The owner is leaving on vacation on Wednesday for 3 weeks and just
informed me today that he wants to VPN in. Typical!

My laptop gets an IP address of 192.168.1.112 mask 255.255.255.0 gateway
192.168.1.112 from the router but I never get through to the internal
network. I can use terminal services from here but not VPN. 

What should I do? Do I need to stop the DSL router from assigning an IP
to the client? Do I need a valid public IP for the external NIC on the
ISA server? 

Amy




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