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Enabling Reverse Lookup

Use the following steps to enable reverse DNS lookup on a client computer:

  1. Log on to the computer as an administrator.
  2. In the Windows Control Panel, locate the LAN connection, open its status dialog box, and then click Properties.
  3. Select Internet Protocol Version 4 (TCP/IPv4), and then click Properties.
  4. If you have a DHCP server in your network environment, confirm that Obtain DNS server address automatically is selected.
  5. If your network environment does not include a DHCP server, select Use the following DNS server addresses and then enter the following values:
    1. In the Preferred DNS server box, enter the IP Address of the DNS server.
    2. Optional: In the Alternate DNS server box, enter the IP Address of an alternate DNS server.
  6. Click Advanced.
    1. Click the DNS tab.
    2. Select Append these DNS suffixes (in order).
    3. Click Add, and in the Domain Suffix box, enter the domain suffix and then click Add. Repeat this step for each DNS suffix, being careful to observe order if required.
    4. Click OK or Close repeatedly until you have returned to the NetworkandSharing Center dialog box, and then close it.

If the DNS is not configured or not supported, the client computer will not be able to perform IP/name resolution, and will not be able to communicate with the remote computers by using the host names. You can overcome this temporarily by adding the IP addresses and the fully qualified domain names in the hosts file of the client computer. Adding hosts file entries is not the best solution, since they create communications control points that may impact other server operations, and are difficult to maintain and manage. They should be used only as temporary solutions until the larger network or DNS issues can be resolved.

You can use the following steps to add entries to the hosts file of the client computer with a Windows operating system:

  1. Log on to the computer as an administrator.
  2. Click Start > Run.
  3. In the Open box, type drivers, and then click OK.
  4. Double-click the etc folder, and then open the hosts file with a text editor.
  5. On one line, enter the IP address, fully qualified domain name, and host name of the remote computer, formatted as shown in the examples below. Add each entry on its own line. Save the hosts file after adding the entries.

    Examples:

    172.32.63.5 dbwin1.idclab.loc dbwin1

    172.14.127.14 dbwin2.idclab.loc dbwin2

To enable reverse lookup on a remote computer, repeat these steps on the remote computer, adding the IP address of the client computer to the hosts file of the remote computer.

For more information, see: http://technet.microsoft.com/en-us/library/cc780585(WS.10).aspx.

For a Unix computer, the entries should be added to /etc/hosts.

Last modified: 5/2/2019 2:28:27 PM