If the version of FreeRDP in the Docker image for 0.9.14 is too old, you
could try building the guacd Docker image from guacamole-server master. The
Dockerfile for guacamole-server has been updated to use Debian stable,
which has a newer FreeRDP.

- Mike


On Mon, Oct 1, 2018 at 11:37 AM, Joachim Lindenberg <joac...@lindenberg.one>
wrote:

> Hello,
>
> I installed a new virtual machine, docker, docker-compose, configured the
> system – I am referencing guacamole/guacd and guacamole/guacamole from my
> docker-compose.yml.
>
>
>
> Connections to Hyper-V VMs are disconnected immediately (didn´t test
> anything else).
>
> Docker logs guacd reveals the following:
>
>
>
> guacd[86]: INFO:        Security mode: NLA
>
> guacd[86]: WARNING:     Installed version of FreeRDP lacks support for the
> preconnection PDU. The specified preconnection BLOB and/or ID will be
> ignored.
>
> guacd[86]: INFO:        Resize method: none
>
> guacd[86]: INFO:        User "@d22fb955-b202-44f3-8e0f-918085a68e68"
> joined connection "$fbccda9f-4170-4a4c-87ab-e824d1ae8434" (1 users now
> present)
>
> guacd[86]: INFO:        Loading keymap "base"
>
> guacd[86]: INFO:        Loading keymap "de-de-qwertz"
>
> recv: Connection reset by peer
>
> guacd[86]: ERROR:       Error connecting to RDP server
>
> guacd[86]: INFO:        User "@d22fb955-b202-44f3-8e0f-918085a68e68"
> disconnected (0 users remain)
>
> guacd[86]: INFO:        Last user of connection 
> "$fbccda9f-4170-4a4c-87ab-e824d1ae8434"
> disconnected
>
> connected to Tom.samba.lindenberg.one:2179
>
> Error: protocol security negotiation failure
>
> guacd[1]: INFO: Connection "$fbccda9f-4170-4a4c-87ab-e824d1ae8434"
> removed.
>
>
>
> docker exec -it guacd xfreerdp --version
>
> This is FreeRDP version 1.0.2
>
>
>
> Is this a known issue? How can I check the freerdp library version? Can I
> upgrade the container? What else can I do?
>
> Thanks & Best Regards, Joachim
>
>
>

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