I use my own Dockerfile to create guacd 1.5.5 image, my image is based on guacamole/guacd:1.5.5.
What changes do I need to make to make sure I use FreeRDP 3.x in my image? My Dockerfile is very basic: FROM guacamole/guacd:1.5.5 USER root < RUN some apk commands and other basic commands> < RUN mkdir fort he image> Get Outlook for Mac <https://aka.ms/GetOutlookForMac> From: Nick Couchman <[email protected]> Date: Sunday, 25 January 2026 at 20:57 To: [email protected] <[email protected]> Cc: Gal Sabas <[email protected]> Subject: Re: NLA-EXT doesn't work On Sun, Jan 18, 2026 at 5:49 AM Gal Sabas via user <[email protected]> wrote: > > Hi, > > I try to connect to my 2025 windows server using an RDP app with security > mode NLA-EXT. > NLA is enforced by the RDP server, and I provide the user’s credentials in > the app settings. > Yet - I fail to connect to the app, I keep getting errors from freeRDP. > I suspect that you're not running into issues with NLA-EXT, but with Kerberos vs. NTLM. If you're running the Docker images, then you're still using FreeRDP 2.x, and that means that Guacamole/FreeRDP will only use NTLM authentication and not Kerberos. You have to use FreeRDP 3.x for Kerberos support, which breaks RemoteApp support in Guacamole. -Nick
