You are a STAR. Thanks for your quick response and solution !!!!
From: Nick Couchman Sent: Wednesday, January 13, 2021 10:02 PM To: [email protected] Subject: Re: Unable to connect VNC server through Guacamole On Wed, Jan 13, 2021 at 10:22 AM Madhukar Bhosale <[email protected]> wrote: Hi, I am unable to connect Linux server using VNC protocol through Guacamole, but if I use vnc viewer I can connect to the same server. Please see below logs. guacd[19837]: Creating new client for protocol vnc guacd[19837]: Connection ID is $ef7ba025-348a-484d-abd9-1feebf8934cb guacd[16213]: Cursor rendering: local guacd[16213]: User @4303b110-fe65-43b2-b022-2919c5c8c620 joined connection $ef7ba025-348a-484d-abd9-1feebf8934cb (1 users now present) guacd[16213]: VNC server supports protocol version 3.8 (viewer 3.8) guacd[16213]: We have 2 security types to read guacd[16213]: 0) Received security type 19 guacd[16213]: Selecting security type 19 (0/2 in the list) guacd[16213]: 1) Received security type 2 guacd[16213]: Selected Security Scheme 19 guacd[16213]: GnuTLS initialized. guacd[16213]: Got VeNCrypt version 0.2 from server. guacd[16213]: We have 2 security types to read guacd[16213]: 0) Received security type 258 guacd[16213]: Selecting security type 258 (0/2 in the list) guacd[16213]: 1) Received security type 2 guacd[16213]: TLS session initialized. guacd[16213]: TLS anonymous credential created. guacd[16213]: TLS handshake blocking. guacd[16213]: TLS handshake blocking. guacd[16213]: TLS handshake done. guacd[16213]: VNC authentication succeeded guacd[16213]: Desktop name myserver:1 (befiuser) guacd[16213]: Connected to VNC server, using protocol version 3.8 guacd[16213]: VNC server default format: guacd[16213]: 32 bits per pixel. guacd[16213]: Least significant byte first in each pixel. guacd[16213]: TRUE colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0 guacd[16213]: No known host keys provided, host identity will not be verified. guacd[16213]: Password authentication failed: Authentication failed (username/password) guacd[16213]: User @4303b110-fe65-43b2-b022-2919c5c8c620 disconnected (0 users remain) guacd[16213]: Last user of connection $ef7ba025-348a-484d-abd9-1feebf8934cb disconnected The second message that you highlighted there is likely for the SFTP connection, and is indicating that the SFTP connection is failing. If SFTP is enabled and the connection fails, Guacamole will shut down the entire connection. So, you need to fix authentication for the SFTP connection, or disable it. -Nick
