CNTLM

CNTLM: Open-source NTLM Authentication Proxy Software

CNTLM is an open-source NTLM authentication proxy software that allows non-NTLM compatible applications like Firefox, IRC clients, etc. to access NTLM protected resources. It's useful for getting around NTLM authentication in corporate environments.

What is CNTLM?

CNTLM is an open-source NT LAN Manager (NTLM) authentication proxy software that allows non-NTLM compatible applications like Firefox, IRC clients, Instant Messaging software, etc. to access NTLM protected resources by using an NTLM capable application that handles authentication.

It works by acting as a proxy between the client and server. CNTLM receives connection requests from clients, authenticates against the NTLM server using a helper application that is NTLM capable, and then passes authorized requests back and forth between the non-NTLM capable client and protected server resources.

CNTLM is commonly used to bypass NTLM authentication used by corporate networks and servers like Microsoft Exchange. Many applications do not support NTLM authentication natively and without a proxy like CNTLM would not be able to access resources protected by NTLM.

By using CNTLM with a browser or other application that lacks native NTLM support, it enables those applications to work seamlessly in NTLM protected environments without any special configuration, making it very useful for getting around limitations imposed by NTLM authentication.

CNTLM Features

Official Links