Learn how to a build a cloud-first strategyRegister Now


enable lmhosts lookup - What does this do?

Posted on 2010-01-07
Medium Priority
Last Modified: 2013-12-23
I am running XP clients and they are reporting as being slow to receive patch pushed from the Domain Controller (2003 Server). I took out my handy dandy baseline document and I found that I must have all workstations network advanced properties "uncheck enable lmhosts lookup". yet all my workstations have it as checked.

My questions is simple , what does this setting do? I am trying to understand this instead of just arbitrarily disabling stuff. I appreciate any help you guys can give. thank you.
Question by:morarc
  • 2
LVL 27

Accepted Solution

davorin earned 1000 total points
ID: 26205669
LMHOSTS is a file that consists of list of ip addresses and netbios names.
When you connected to a computer or website, if LMHOSTS is enabled, it will check this file to see if there is an entry for that computer and use the IP address found in this file. If there is no LMHOSTS file it will usually use DNS or WINS.
It really doesn't make any difference if it is enabled or not, because if you don't have the file it will use DNS/WINS.
LVL 17

Assisted Solution

Mike_Carroll earned 1000 total points
ID: 26205674
LMHOSTS lookups can cause sporadic slowdowns and pauses.

It is basically a way of short circuiting the location of devices on a network.

The official docs from Microsoft are here http://www.microsoft.com/resources/documentation/windowsnt/4/server/reskit/en-us/net/sur_lmh.mspx?mfr=true

Author Closing Comment

ID: 31674328
thank you very much for your answers, this helped :)
LVL 27

Expert Comment

ID: 26205951
you are welcome

Featured Post

Restore individual SQL databases with ease

Veeam Explorer for Microsoft SQL Server delivers an easy-to-use, wizard-driven interface for restoring your databases from a backup. No expert SQL background required. Web interface provides a complete view of all available SQL databases to simplify the recovery of lost database

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I'm a big fan of Windows' offline folder caching and have used it on my laptops for over a decade.  One thing I don't like about it, however, is how difficult Microsoft has made it for the cache to be moved out of the Windows folder.  Here's how to …
Learn about cloud computing and its benefits for small business owners.
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question