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https://issues.apache.org/jira/browse/GUACAMOLE-1036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17267296#comment-17267296
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Nick Couchman commented on GUACAMOLE-1036:
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[~Dude]: Thank you for testing and confirming that, this at least helps
determine where we need to look for the issue. As far as whether it is in
Guacamole or not, I'm not certain - since clipboard support works fine across
other RDP server platforms (all Windows versions and xrdp), it seems like there
may be something amiss in the freerdp-shadow server. Also, the error (BIO_read
returned a system error 0: Success) seems to be a FreeRDP library-level error,
a little below guacd, so it's possible that the error is occurring somewhere
within FreeRDP and not in Guacamole's handling of the clipboard.
> can not connect via RDP using guacamole docker
> ----------------------------------------------
>
> Key: GUACAMOLE-1036
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1036
> Project: Guacamole
> Issue Type: Bug
> Components: RDP
> Affects Versions: 1.1.0
> Environment: guacamole 1.1.0 on Manjaro with Docker 19.03.8-ce
> Reporter: Jeffrey Lebowski
> Priority: Minor
>
> I set up guacamole via docker and nginx as reverse proxy.
> VNC-connections work as expected, but RDP does not.
> The system I want to remote control is an Arch linux system running x11vnc
> and FreeRDP version 2.0.0 (git n/a).
> I would say the guacamole docker side is set up correctly because "everything
> VNC" and "everything SSH" to my Arch system works.
> The FreeRDP setup on the Arch system is this (started as a normal user, not
> root):
> {{[xx@arch]$ freerdp-shadow-cli -auth}}
> {{[13:12:17:144] [52077:52077] [INFO][com.freerdp.server.shadow.x11] - X11
> Extensions: XFixes: 1 Xinerama: 1 XDamage: 0 XShm: 0}}
> {{[13:12:17:148] [52077:52077] [INFO][com.freerdp.core.listener] - Listening
> on 0.0.0.0:3389}}
> Then the connection from guacamole:
> {{[13:13:01:657] [52077:52085] [INFO][com.freerdp.core.connection] - Client
> Security: NLA:0 TLS:1 RDP:0}}
> {{[13:13:01:657] [52077:52085] [INFO][com.freerdp.core.connection] - Server
> Security: NLA:0 TLS:1 RDP:1}}
> {{[13:13:01:657] [52077:52085] [INFO][com.freerdp.core.connection] -
> Negotiated Security: NLA:0 TLS:1 RDP:0}}
> {{[13:13:01:662] [52077:52085] [INFO][com.freerdp.core.connection] - Accepted
> client: Guacamole RDP}}
> {{[13:13:01:662] [52077:52085] [INFO][com.freerdp.core.connection] - Accepted
> channels:}}
> {{[13:13:01:662] [52077:52085] [INFO][com.freerdp.core.connection] - cliprdr}}
> {{[13:13:01:662] [52077:52085] [INFO][com.freerdp.core.connection] - rdpdr}}
> {{[13:13:01:662] [52077:52085] [INFO][com.freerdp.core.connection] - rdpsnd}}
> {{[13:13:01:662] [52077:52085] [INFO][com.freerdp.core.connection] - drdynvc}}
> {{[13:13:01:662] [52077:52085] [INFO][com.freerdp.core.gcc] - Active rdp
> encryption level: NONE}}
> {{[13:13:01:662] [52077:52085] [INFO][com.freerdp.core.gcc] - Selected rdp
> encryption method: NONE}}
> {{[13:13:01:686] [52077:52085] [INFO][com.freerdp.client.shadow] - Client
> from 192.168.0.16 is activated (1920x1080@32)}}
> {{[13:13:01:814] [52077:52085] [ERROR][com.freerdp.core.peer] -
> peer_recv_callback: CONNECTION_STATE_ACTIVE - peer_recv_pdu() fail}}
> {{[13:13:01:814] [52077:52085] [ERROR][com.freerdp.core.transport] -
> transport_check_fds: transport->ReceiveCallback() - -1}}
> {{[13:13:01:814] [52077:52085] [ERROR][com.freerdp.client.shadow] - Failed to
> check FreeRDP file descriptor}}
> That connection in the guacd log:
> {{guacd[6]: INFO: Guacamole proxy daemon (guacd) version 1.1.0 started}}
> {{guacd[6]: INFO: Listening on host 0.0.0.0, port 4822}}
> {{guacd[6]: INFO: Creating new client for protocol "rdp"}}
> {{guacd[6]: INFO: Connection ID is "$f8d73f56-bf55-4335-8c68-3b0b9376f4ed"}}
> {{guacd[8]: INFO: Security mode: Negotiate (ANY)}}
> {{guacd[8]: INFO: Resize method: display-update}}
> {{guacd[8]: INFO: User "@dd6c34f0-833e-4e07-a9b4-c02b15cac414" joined
> connection "$f8d73f56-bf55-4335-8c68-3b0b9376f4ed" (1 users now present)}}
> {{guacd[8]: INFO: Loading keymap "base"}}
> {{guacd[8]: INFO: Loading keymap "de-de-qwertz"}}
> {{guacd[8]: INFO: Accepted format: 16-bit PCM with 2 channels at 44100 Hz}}
> {{guacd[8]: ERROR: Connection closed.}}
> {{guacd[8]: INFO: Internal RDP client disconnected}}
> {{guacd[8]: INFO: User "@dd6c34f0-833e-4e07-a9b4-c02b15cac414" disconnected
> (0 users remain)}}
> {{guacd[8]: INFO: Last user of connection
> "$f8d73f56-bf55-4335-8c68-3b0b9376f4ed" disconnected}}
> {{guacd[6]: INFO: Connection "$f8d73f56-bf55-4335-8c68-3b0b9376f4ed"
> removed.}}
> The "funny" thing is that in the browser used to connect I can sometimes see
> a "screenshot" of my Arch desktop when trying the RDP connection but
> immediatly after that comes the guacamole error message aborting the
> connection.
> Another strange thing is that - only once - I got a "red screen" with
> "Welcome" written on it in the browser trying the RDP connection (but I did
> not the the desktop or anything else).
> I tried different RDP connections settings in guacamole - none of them works
> as expected.
>
>
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