Overview
What is Cntlm?
Cntlm : Authentication proxy that you can use
In depth
A closer look at Cntlm
Cntlm was built as a NTLM / NTLM Session Response / NTLMv2 authenticating HTTP proxy that is mainly intended to help the user break free from Microsoft's proprietary world chains. Cntlm stands between your applications and the corporate proxy, adding NTLM authentication on-the-fly. You can specify several "parent" proxies and Cntlm will try one after another until one works. All authenticad connections are cached and reused to achieve high efficiency. Just point your apps proxy settings at Cntlm, fill in cntlm.conf (cntlm.ini) and you're ready to do. This is useful on Windows, but essential for non-Microsoft OS's.
Verdict
Should you download Cntlm?
Cntlm runs on
Windows 10/11
and is available under the
GNU Public License
license
— the installer is 1.3 MB.
We’ve catalogued it under
Networking.
✓
Verified clean. Every Cntlm build on SoftLookup is scanned for viruses, spyware, adware, trojans and backdoors. We re-test on every update.
Sponsored
At a glance
Cntlm specifications
- Publisher
-
David Kubicek
- Last updated
- May 1, 2026
- License
- GNU Public License
- Operating system
- Windows 10/11
- File size
- 1.3 MB
- Price
- Free
- Page views
- 420
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