Exercise 10.2: Using an LMHOSTS File

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Exercise 10.2: Using an LMHOSTS File

In this exercise, you want to show how you can use an LMHOSTS file to browse across a router. You need the same configuration as in the previous exercise, except that this time you need to make certain that WINS is disabled. Figure 10.17 shows a diagram of the lab layout.

First, you should browse using Network Neighborhood and notice what you see available. With everything disabled, you should only be able to see what is currently on your local subnet. If this is true, you can go on to create an LMHOSTS file. If this is not true, you will continue to be able to see other domains and workgroups in other subnets, which means that even if you implement the LMHOSTS file you will not be able to guarantee that it is actually the LMHOSTS file providing your resolution. This is why you need to check that there is no access before setting up the LMHOSTS file so that after you set it up you can prove the access to a remote subnet is provided by the LMHOSTS file and not some other means of resolution.

You now need to create an LMHOSTS file on each of the Master Browsers on each subnet, pointing specifically to the Master Browser on the other side of the subnet. Make sure you put the LMHOSTS file in the correct location. On Windows NT systems it goes in the \system_root\system32\drivers\etc directory. On Windows 95 and WFW it goes in the \system_root (c:\windows). Don’t forget the #PRE and #DOM: statements.

After you have the files set up in the correct location, you need to enable LMHOSTS to be read by following these steps:

1.	Go into the Windows NT Network Properties.
2.	Select Protocols, TCP/IP, Properties.
3.	Go to WINS address and click on Enable LMHOSTS lookup (see Figure 10.18).
4.	Click OK and close all screens.

Now you should have LMHOSTS enabled. Go to Network Neighborhood and try exploring. You should see resources on both sides of the router now that you have enabled the usage of an LMHOSTS file. Again when browsing these remote resources through Network Neighborhood the browse list does take a few minutes to update.

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