Configuring DRAS with Reserved IP Addresses for Private Networks

This article was previously published under Q178538
This article has been archived. It is offered "as is" and will no longer be updated.
SUMMARY
Per RFC 1597: Section 3: Private Address Space, The Internet AssignedNumbers Authority (IANA) has reserved the following three blocks of the IPaddress space for private networks: 10.0.0.0 - 10.255.255.255 , 172.16.0.0- 172.31.255.255, and 192.168.0.0 - 192.168.255.254.

These network IDs and the associated IP addresses may be used freely inany internal network scheme and will not affect interoperability with theInternet as a whole. In particular, the class C range is the preferredrange to use when configuring the async connectors of Microsoft ExchangeServer.
MORE INFORMATION
Each async interface on a Windows NT Server computer requires two (2) ipaddress; one for the server and one for the client of the particularsession. The network ID of the async interface should be such that theasync interface is on a different subnet than the network interface of theserver; as such the unit is multihomed. Using a subnet mask of 255 in thethird octet of the class C address allows 255 networks with 254 hosts oneach network; this facilitates ease of planning and configuration.

For example, connect 3 Exchange sites through the Dynamic Remote AccessService (RAS) connector. Each Exchange Server computer has a single modem.

  1. In the RAS configuration, select a static pool of addresses.
  2. Configure the pools on each server as follows.
          Server_1 192.168.1.1 and 198.168.1.2;      Server_2 192.168.2.1 and 192.168.2.2      Server_3 192.168.3.1 and 192.168.3.2.
Thus the RAS server session on each server will get the .1 address and theclient session will be assigned the .2 address.
IP XFOR XCON TCP NT STACK ADDRESS TSHOOT
Properties

Article ID: 178538 - Last Review: 10/07/2013 16:21:04 - Revision: 3.3

  • Microsoft Exchange Server 4.0 Standard Edition
  • Microsoft Exchange Server 5.0 Standard Edition
  • Microsoft Exchange Server 5.5 Standard Edition
  • kbnosurvey kbarchive kbinfo KB178538
Feedback