Hi, I have been using guac for about a month and it has been running flawlessly. All of a sudden today, I get complaints that users cannot login. I am using radius for authentication and so I see this in the guacamole logs:
13:34:29.154 [http-nio-8080-exec-1] ERROR o.a.g.a.r.AuthenticationProviderService - Cannot configure RADIUS server: Unable to resolve RADIUS server host. 1 So I think I have a DNS issue, however, I can ping the radius server name and it correctly resolves the IP on the server command line. This seems to get fixed when I reload the guacamole docker image however, now that I can login, I cannot connect to any of my connections. When I look at the guacd logs, I see this for every connection: guacd[1]: INFO: Creating new client for protocol "rdp" guacd[1]: INFO: Connection ID is "$17fe4200-8b26-4ed1-915f-c65b6182373a" guacd[197]: INFO: No security mode specified. Defaulting to security mode negotiation with server. guacd[197]: INFO: Resize method: none guacd[197]: INFO: No clipboard line-ending normalization specified. Defaulting to preserving the format of all line endings. guacd[197]: INFO: User "@8b1e148e-31f4-42e5-a738-219c3cc51132" joined connection "$17fe4200-8b26-4ed1-915f-c65b6182373a" (1 users now present) guacd[197]: INFO: Local system reports 2 processor(s) are available. guacd[197]: INFO: Graphical updates will be encoded using 2 worker thread(s). guacd[197]: INFO: Loading keymap "base" guacd[197]: INFO: Loading keymap "en-us-qwerty" guacd[197]: INFO: RDP server closed/refused connection: DNS lookup failed (incorrect hostname?) guacd[197]: INFO: User "@8b1e148e-31f4-42e5-a738-219c3cc51132" disconnected (0 users remain) guacd[197]: INFO: Last user of connection "$17fe4200-8b26-4ed1-915f-c65b6182373a" disconnected guacd[1]: INFO: Connection "$17fe4200-8b26-4ed1-915f-c65b6182373a" removed. Again, another name resolution issue... so I reboot the server completely and I am still getting the issue. right now I cannot connect to name connections, but I can connect when I change the name to the IP address. And again, all of these names resolve just fine from the server comand line.... So, now I just figured out how to create a shell in the guacd docker image like this: docker exec -it guacd sh and from inside the guacd docker image, I cannot name resolve any more. Again, this was working until today and I cannot see anything that changed. Can anyone give me a clue as to why this would have started out of the blue? Thanks in advance Tony
