User:Aruntk89

--Aruntk89 (talk) 15:04, 21 January 2009 (UTC)ARUN TK --Aruntk89 (talk) 15:04, 21 January 2009 (UTC)

--Aruntk89 (talk) 15:04, 21 January 2009 (UTC)ARUN TK --Aruntk89 (talk) 15:04, 21 January 2009 (UTC)

LMHOSTS

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The LMHOSTS (LAN Manager Hosts) file is used to enable domain name resolution when other methods, e.g. WINS, fail.

The file, if it exists, is read as the LMHOSTS setting file. A sample file is provided during Windows installation. The sample file contains documentation for manually configuring the file. Contents [hide] 

   * 1 File Locations
         o 1.1 Windows Millennium Edition
         o 1.2 Windows NT 4.0, Windows 2000, Windows XP, Vista and Windows Server 2003
               + 1.2.1 Default contents
   * 2 External links
   * 3 See also

File Locations

Windows Millennium Edition

The file located at %windir%\lmhosts, and a sample file is located at %windir%\lmhosts.sam. The %windir% is an environmental variable which can be output from a command prompt using "echo %windir%" (without the quotation marks). The default value of %windir% in Windows ME is "C:\Windows" (without the quotation marks). 

Windows NT 4.0, Windows 2000, Windows XP, Vista and Windows Server 2003

The file is located at C:\WINDOWS\system32\drivers\etc\, and a sample file is located at C:\WINDOWS\system32\drivers\etc\lmhosts.sam. If a different install directory was used for the Windows files, the file can be located with the path %systemroot%\system32\drivers\etc\. 

Default contents
  2. #PRE
  3. #DOM:<domain>
  4. #INCLUDE <filename>
  5. #BEGIN_ALTERNATE
  6. #END_ALTERNATE
  7. \0xnn (non-printing character support)
  9. Following any entry in the file with the characters "#PRE" will cause
  10. the entry to be preloaded into the name cache. By default, entries are
  11. not preloaded, but are parsed only after dynamic name resolution fails.
  13. Following an entry with the "#DOM:<domain>" tag will associate the
  14. entry with the domain specified by <domain>. This affects how the
  15. browser and logon services behave in TCP/IP environments. To preload
  16. the host name associated with #DOM entry, it is necessary to also add a
  17. #PRE to the line. The <domain> is always preloaded although it will not
  18. be shown when the name cache is viewed.
  20. Specifying "#INCLUDE <filename>" will force the RFC NetBIOS (NBT)
  21. software to seek the specified <filename> and parse it as if it were
  22. local. <filename> is generally a UNC-based name, allowing a
  23. centralized lmhosts file to be maintained on a server.
  24. It is ALWAYS necessary to provide a mapping for the IP address of the
  25. server prior to the #INCLUDE. This mapping must use the #PRE directive.
  26. In addition the share "public" in the example below must be in the
  27. LanManServer list of "NullSessionShares" in order for client machines to
  28. be able to read the lmhosts file successfully. This key is under
  29. \machine\system\currentcontrolset\services\lanmanserver\parameters\nullsessionshares
  30. in the registry. Simply add "public" to the list found there.
  32. The #BEGIN_ and #END_ALTERNATE keywords allow multiple #INCLUDE
  33. statements to be grouped together. Any single successful include
  34. will cause the group to succeed.
  36. Finally, non-printing characters can be embedded in mappings by
  37. first surrounding the NetBIOS name in quotations, then using the
  38. \0xnn notation to specify a hex value for a non-printing character.
  40. The following example illustrates all of these extensions:
  42. 102.54.94.97 rhino #PRE #DOM:networking #net group's DC
  43. 102.54.94.102 "appname \0x14" #special app server
  44. 102.54.94.123 popular #PRE #source server
  45. 102.54.94.117 localsrv #PRE #needed for the include
  47. #BEGIN_ALTERNATE
  48. #INCLUDE \\localsrv\public\lmhosts
  49. #INCLUDE \\rhino\public\lmhosts
  50. #END_ALTERNATE
  52. In the above example, the "appname" server contains a special
  53. character in its name, the "popular" and "localsrv" server names are
  54. preloaded, and the "rhino" server name is specified so it can be used
  55. to later #INCLUDE a centrally maintained lmhosts file if the "localsrv"
  56. system is unavailable.
  58. Note that the whole file is parsed including comments on each lookup,
  59. so keeping the number of comments to a minimum will improve performance.
  60. Therefore it is not advisable to simply add lmhosts file entries onto the
  61. end of this file.

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