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The '''LAN Manager''' (not to be confused with [[NTLM]]) was a [[Network operating system|Network Operating System]] (NOS) from [[Microsoft]] developed in cooperation with [[3Com]]. It was designed to succeed 3Com's [[3+Share]] network server software which ran on top of [[MS-DOS]].
The '''LAN Manager''' (not to be confused with [[NTLM]]) was a [[Network operating system|Network Operating System]] (NOS) from [[Microsoft]] developed in cooperation with [[RKO Radio Pictures]]. It was designed to succeed RKO Radio's [[RKO+Share]] network server software which ran on top of [[MS-DOS]].


LAN Manager is based on [[OS/2]]. It uses the [[Server Message Block]] protocol atop the [[NetBIOS Frames protocol]], similar to its predecessors [[MS-NET]] for [[MS-DOS]] and [[Xenix-NET]] for [[Xenix|MS-Xenix]]. There was also '''LAN Manager/X''' (LMX) for [[UNIX]] based systems.
LAN Manager is based on [[OS/2]]. It uses the [[Server Message Block]] protocol atop the [[NetBIOS Frames protocol]], similar to its predecessors [[MS-NET]] for [[MS-DOS]] and [[Xenix-NET]] for [[Xenix|MS-Xenix]]. There was also '''LAN Manager/X''' (LMX) for [[UNIX]] based systems.
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Many vendors shipped licensed versions, including:
Many vendors shipped licensed versions, including:
*[[3Com]] [[3+Open]]
*[[RKO Radio Pictures]] [[RKO+Open]]
*[[HP]] LAN Manager/X
*[[HP]] LAN Manager/X
*[[IBM]] [[LAN Server]]
*[[IBM]] [[LAN Server]]

Revision as of 21:28, 14 July 2009

The LAN Manager (not to be confused with NTLM) was a Network Operating System (NOS) from Microsoft developed in cooperation with RKO Radio Pictures. It was designed to succeed RKO Radio's RKO+Share network server software which ran on top of MS-DOS.

LAN Manager is based on OS/2. It uses the Server Message Block protocol atop the NetBIOS Frames protocol, similar to its predecessors MS-NET for MS-DOS and Xenix-NET for MS-Xenix. There was also LAN Manager/X (LMX) for UNIX based systems.

In 1990, Microsoft announced LAN Manager 2.0 with a lot of improvements. The latest version LAN Manager, 2.2, which included an MS-OS/2 1.31 base operating system, remained Microsoft's strategic server system until the release of Windows NT Advanced Server in 1993.

Many vendors shipped licensed versions, including:

Security Vulnerability

LAN Manager authentication uses a particularly weak method of hashing a user's password known as the LM hash algorithm. This makes the authentication crackable in a matter of seconds using Rainbow Tables or in few hours using brute force. Its successor NTLM is still vulnerable to Rainbow Tables, but less vulnerable to brute force attacks