Configuring DRAS with Reserved IP Address for Private Networks

Last reviewed: January 7, 1998
Article ID: Q178538
The information in this article applies to:
  • Microsoft Exchange Server versions 4.0, 5.0, 5.5

SUMMARY

Per RFC 1597: Section 3: Private Address Space, The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP address 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 in any internal network scheme and will not affect interoperability with the Internet as a whole. In particular, the class C range is the preferred range to use when configuring the async connectors of Microsoft Exchange Server.

MORE INFORMATION

Each async interface on a Windows NT Server computer requires two (2) ip address; one for the server and one for the client of the particular session. The network ID of the async interface should be such that the async interface is on a different subnet than the network interface of the server; as such the unit is multihomed. Using a subnet mask of 255 in the third octet of the class C address allows 255 networks with 254 hosts on each network; this facilitates ease of planning and configuration.

For example, connect 3 Exchange sites through the Dynamic Remote Access Service (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 the client session will be assigned the .2 address.


Additional query words: IP XFOR XCON TCP NT STACK ADDRESS TSHOOT
Keywords : XCON
Version : WINDOWS:4.0,5.0,5.5
Platform : WINDOWS
Hardware : ALPHA x86
Issue type : kbinfo
Solution Type : kbworkaround


THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: January 7, 1998
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.