We are trying to upgrade all of our servers to at least RHEL 8 since RHEL 7 will no longer be supported after June 30. One of our Guacamole servers on RHEL 7 is running 1.1.0, and the VNC connections work well. On the new server we created on RHEL 8, with Guacamole 1.5.4, VNC immediately fails. The /var/log/messages shows:
Apr 24 15:08:26 tfdm-access server[1705]: 15:08:26.232 [http-nio-8080-exec-4] INFO o.a.g.r.auth.AuthenticationService - User "guacadmin" successfully authenticated from [172.26.46.176, 127.0.0.1]. Apr 24 15:08:36 tfdm-access guacd[15105]: Creating new client for protocol "vnc" Apr 24 15:08:36 tfdm-access guacd[15105]: Connection ID is "$6ae02db1-b8b3-4c4d-84ac-4978896156b3" Apr 24 15:08:36 tfdm-access guacd[310149]: Cursor rendering: local Apr 24 15:08:36 tfdm-access guacd[310149]: User "@be3d0de5-cbdc-420e-9e8f-c2554fdd21c6" joined connection "$6ae02db1-b8b3-4c4d-84ac-4978896156b3" (1 users now present) Apr 24 15:08:36 tfdm-access server[1705]: 15:08:36.844 [http-nio-8080-exec-8] INFO o.a.g.tunnel.TunnelRequestService - User "guacadmin" connected to connection "237". Apr 24 15:08:36 tfdm-access server[1705]: 15:08:36.844 [http-nio-8080-exec-8] INFO o.a.g.t.h.RestrictedGuacamoleHTTPTunnelServlet - Using HTTP tunnel (not WebSocket). Performance may be sub-optimal. Apr 24 15:08:36 tfdm-access guacd[310149]: VNC server supports protocol version 3.8 (viewer 3.8) Apr 24 15:08:36 tfdm-access guacd[310149]: We have 2 security types to read Apr 24 15:08:36 tfdm-access guacd[310149]: 0) Received security type 19 Apr 24 15:08:36 tfdm-access guacd[310149]: Selecting security type 19 (0/2 in the list) Apr 24 15:08:36 tfdm-access guacd[310149]: 1) Received security type 2 Apr 24 15:08:36 tfdm-access guacd[310149]: Selected Security Scheme 19 Apr 24 15:08:36 tfdm-access guacd[310149]: Failed to initialized GnuTLS: Error in public key generation.. Apr 24 15:08:36 tfdm-access guacd[310149]: Unable to connect to VNC server. Apr 24 15:08:37 tfdm-access guacd[310149]: User "@be3d0de5-cbdc-420e-9e8f-c2554fdd21c6" disconnected (0 users remain) Apr 24 15:08:37 tfdm-access guacd[310149]: Last user of connection "$6ae02db1-b8b3-4c4d-84ac-4978896156b3" disconnected Apr 24 15:08:37 tfdm-access guacd[15105]: Connection "$6ae02db1-b8b3-4c4d-84ac-4978896156b3" removed. Apr 24 15:08:37 tfdm-access server[1705]: 15:08:37.359 [http-nio-8080-exec-10] INFO o.a.g.tunnel.TunnelRequestService - User "guacadmin" disconnected from connection "237". Duration: 515 milliseconds Apr 24 15:08:37 tfdm-access server[1705]: 15:08:37.362 [http-nio-8080-exec-2] INFO o.a.g.tunnel.TunnelRequestService - User "guacadmin" disconnected from connection "237". Duration: 518 milliseconds Apr 24 15:08:41 tfdm-access server[1705]: 15:08:41.621 [http-nio-8080-exec-4] WARN o.a.g.s.GuacamoleHTTPTunnelServlet - HTTP tunnel request rejected: No such tunnel. Where could I start looking for a way to debug this? Could it have something to do with the VNC libraries on 1.5.4? Thanks, Harry [cid:[email protected]] Harry Devine Secure-OSE System Administrator Red Hat Certified System Administrator (RHCSA) Office: (609) 485-4218 Personal Cell: (609) 276-0555 FAA Cell: (609) 612-7274 Home Office/Telework: (609) 547-3579 Email : [email protected] William J Hughes Technical Center Building 300 3rd Floor Column L20 Atlantic City, NJ 08405
