Hi, Got it working. So on the test system it was working with 1.5.5 and 1.6.0 also. And compiled flawlessly! As you can see in my earlier mail chain, i had some errors during configuring the compile script. (Configure and make.) Now i downloaded from the git to the test VM, and it haven't got this issue. And i also deleted the guacamole-server directory from the home server, and started from clean again. The autoreconf - made configure script was OK. Then i noticed the SSH.....no in the protocol summary. It was definitely ran with --with-ssh2. Libs were OK, except libpango. But that was installed before, because 1.5.5 definitely needs it for SSH. Seems like the Debian Testing hallucinated that libpango is installed, but it wasn't. (It's not surprising on Testing that some packages disappear.)
The only strange thing was the behavior of Guacamole, as although there was no SSH support compiled in, it stand at the waiting state... I think this was misleading for all of us. Thanks for all your support - maybe this worths to add some error messages, if some protocol is specified at compiling, but libs are missing, or in the connection state, but it's up to you :) . Cs. On Sat, Jul 5, 2025 at 8:02 PM Anakien Skywalker <[email protected]> wrote: > > Are you using http over websocket for purpose? Could you try to switch to > websocket mode? >> >> enable-websocket >> >> true if WebSocket support should be enabled, false (or simply leave the >> property out) otherwise. > > If you did not set enable-websocket false, it should be websocket by default > 🤨 > > сб, 5 июл. 2025 г. в 20:53, Horváth Csaba <[email protected]>: >> >> Hi, >> >> I completely self-built the server, the client is downloaded from the >> website :) >> >> Thanks for the debug hint, will try :) >> >> Cs. >> >> On Sat, Jul 5, 2025 at 7:48 PM Anakien Skywalker <[email protected]> >> wrote: >> >> >> >> First @Anakien, i checked a target computer, and there are even no >> >> logins happening here, so the communication is not reaching. I have no >> >> internal firewalls or so, and the server where Guacamole runs, can >> >> reach this computer with ssh command from shell. In addition, ssh from >> >> Guacamole does not work towards none of the computers here. (But this >> >> was a good idea, anyway, it could be reveal problems, so thx :) ) >> > >> > This is what I thought. The connection is closed before it is actually >> > established. Something is wrong between guacamole client (if you use >> > guacamole client) and guacd. Did you upgrade the client to 1.6.0 as well? >> > You would need to put it in debug mode and provide logs as well. It is a >> > bit more complicated then turn on debug for guacd: >> > https://guacamole.apache.org/doc/gug/configuring-guacamole.html#logging-within-the-web-application >> > >> > >> > сб, 5 июл. 2025 г. в 20:43, Horváth Csaba <[email protected]>: >> >> >> >> Hi, >> >> >> >> First @Anakien, i checked a target computer, and there are even no >> >> logins happening here, so the communication is not reaching. I have no >> >> internal firewalls or so, and the server where Guacamole runs, can >> >> reach this computer with ssh command from shell. In addition, ssh from >> >> Guacamole does not work towards none of the computers here. (But this >> >> was a good idea, anyway, it could be reveal problems, so thx :) ) >> >> >> >> @Nick Couchman : Yes, the UUID appears in this way in the logs. Was >> >> strange for me too but not enough... :D >> >> Stopping traffic - i have no firewalls on the computers, and SSH >> >> itself works. So this can be an issue with guacd, i think. The double >> >> free is strange, but i have no signs of something crashing or >> >> segfaulting (also suspicious, because such an error cold be >> >> related...). >> >> Guacd and Guacamole webserver are running on the same computer. All >> >> other connection types are working, except SSH. >> >> >> >> How do i put the client in debug mode? >> >> Tomcat log in normal mode during an SSH connection - during this i can >> >> see the gray "Connected to Guacamole. Waiting for response" : >> >> [2025-07-05 19:33:35] [info] 19:33:35.887 [http-nio-8080-exec-11] >> >> DEBUG o.a.g.event.EventLoggingListener - User "user" (authenticated by >> >> "default") successfully re-authenticated their existing session from >> >> [192.168.1.103, 127.0.0.1] >> >> [2025-07-05 19:33:36] [info] 19:33:36.024 [http-nio-8080-exec-19] >> >> DEBUG o.a.g.net.InetGuacamoleSocket - Connecting to guacd at >> >> localhost:4822. >> >> [2025-07-05 19:33:36] [info] 19:33:36.043 [http-nio-8080-exec-19] INFO >> >> o.a.g.tunnel.TunnelRequestService - User "user" connected to >> >> connection "T480 SSH". >> >> [2025-07-05 19:33:36] [info] 19:33:36.043 [http-nio-8080-exec-19] >> >> DEBUG o.a.g.event.EventLoggingListener - Ignoring >> >> unknown/unimplemented event type: class >> >> org.apache.guacamole.net.event.TunnelConnectEvent >> >> [2025-07-05 19:33:36] [info] 19:33:36.043 [http-nio-8080-exec-19] INFO >> >> o.a.g.t.h.RestrictedGuacamoleHTTPTunnelServlet - Using HTTP tunnel >> >> (not WebSocket). Performance may be sub-optimal. >> >> [2025-07-05 19:33:36] [info] 19:33:36.043 [http-nio-8080-exec-19] >> >> DEBUG o.a.g.s.GuacamoleHTTPTunnelServlet - Registered tunnel >> >> "a9296166-2ac3-4267-aeee-98e246c7a2c1". >> >> [2025-07-05 19:33:36] [info] 19:33:36.092 [http-nio-8080-exec-17] >> >> DEBUG o.a.g.rest.RESTExceptionMapper - Client request rejected: No >> >> readable active connection for tunnel. >> >> [2025-07-05 19:33:36] [info] 19:33:36.918 [pool-4-thread-1] DEBUG >> >> o.a.g.rest.auth.HashTokenSessionMap - Checking for expired or invalid >> >> sessions... >> >> [2025-07-05 19:33:36] [info] 19:33:36.918 [pool-4-thread-1] DEBUG >> >> o.a.g.rest.auth.HashTokenSessionMap - Session check completed in 0 ms. >> >> [2025-07-05 19:34:36] [info] 19:34:36.918 [pool-4-thread-1] DEBUG >> >> o.a.g.rest.auth.HashTokenSessionMap - Checking for expired or invalid >> >> sessions... >> >> [2025-07-05 19:34:36] [info] 19:34:36.918 [pool-4-thread-1] DEBUG >> >> o.a.g.rest.auth.HashTokenSessionMap - Session check completed in 0 ms. >> >> [2025-07-05 19:35:36] [info] 19:35:36.918 [pool-4-thread-1] DEBUG >> >> o.a.g.rest.auth.HashTokenSessionMap - Checking for expired or invalid >> >> sessions... >> >> [2025-07-05 19:35:36] [info] 19:35:36.918 [pool-4-thread-1] DEBUG >> >> o.a.g.rest.auth.HashTokenSessionMap - Session check completed in 0 ms. >> >> [2025-07-05 19:36:36] [info] 19:36:36.918 [pool-4-thread-1] DEBUG >> >> o.a.g.rest.auth.HashTokenSessionMap - Checking for expired or invalid >> >> sessions... >> >> [2025-07-05 19:36:36] [info] 19:36:36.918 [pool-4-thread-1] DEBUG >> >> o.a.g.rest.auth.HashTokenSessionMap - Session check completed in 0 ms. >> >> >> >> (This continues to the infinity) >> >> >> >> During this, two guacd processes are there >> >> # ps aux|grep guac >> >> root 2665853 0.0 0.2 764912 16144 ? Sl 15:20 0:00 >> >> /usr/local/sbin/guacd -f -b 127.0.0.1 -L debug -l 4822 -p >> >> /tmp/guacd.pid >> >> root 2925052 0.0 0.2 777144 17320 ? Sl 19:33 0:00 >> >> /usr/local/sbin/guacd -f -b 127.0.0.1 -L debug -l 4822 -p >> >> /tmp/guacd.pid >> >> root 2927526 0.0 0.0 6528 2340 pts/4 S+ 19:36 0:00 grep >> >> guac >> >> >> >> The no readable active connection is a WTF. During this on the >> >> 192.168.1.103 there are no connection requests in the SSH log. >> >> >> >> I plan to check this on my test VM where i tested the Guacamole >> >> install for 1.5.5 but i have omitted the test for 1.6, so i can >> >> reproduce the issue with upgrading. As soon as i have time :( >> >> >> >> Thanks for your help :) >> >> >> >> Cs. >> >> >> >> On Sat, Jul 5, 2025 at 6:14 PM Nick Couchman <[email protected]> wrote: >> >> > >> >> > On Sat, Jul 5, 2025 at 9:27 AM Horváth Csaba >> >> > <[email protected]> wrote: >> >> >> >> >> >> Hi, >> >> >> >> >> >> The previous log was written by guacd with parameter -L debug, i only >> >> >> copied from syslog. >> >> >> >> >> >> Now i tried again. In the below log i first connected to a VNC server >> >> >> (so you can see the server is basically working) and then tried SSH, >> >> >> but this time i got the message "Connected to Guacamole" and right >> >> >> after the red ribbon with "Error occurred within the Guacamole >> >> >> server..." >> >> >> >> >> >> # /usr/local/sbin/guacd -f -b 127.0.0.1 -L debug -l 4822 -p >> >> >> /tmp/guacd.pid >> >> >> guacd[2658943]: INFO: Guacamole proxy daemon (guacd) version 1.6.0 >> >> >> started >> >> >> guacd[2658943]: DEBUG: Successfully bound AF_INET socket to host >> >> >> 127.0.0.1, port 4822 >> >> >> guacd[2658943]: INFO: Listening on host 127.0.0.1, port 4822 >> >> >> ... >> >> >> guacd[2658943]: INFO: Creating new client for protocol "ssh" >> >> >> guacd[2658943]: INFO: Connection ID is >> >> >> "$0eb617c4-ec41-46a0-9be9-7d0705aea227" >> >> >> guacd[2659316]: DEBUG: Processing instruction: size >> >> >> guacd[2659316]: DEBUG: Processing instruction: audio >> >> >> guacd[2659316]: DEBUG: Processing instruction: video >> >> >> guacd[2659316]: DEBUG: Processing instruction: image >> >> >> guacd[2659316]: DEBUG: Processing instruction: timezone >> >> >> guacd[2659316]: DEBUG: Processing instruction: name >> >> >> guacd[2659316]: INFO: User "@04f87cbf-6f45-4785-897f-5df0cdfd8fbc" >> >> >> joined connection "�!A�" (1 users now present) >> >> >> guacd[2659316]: DEBUG: Client is using protocol version >> >> >> "VERSION_1_5_0" >> >> >> guacd[2658943]: INFO: Creating new client for protocol "ssh" >> >> >> guacd[2658943]: INFO: Connection ID is >> >> >> "$ad924c87-097e-4f1b-b0ab-8e3788c0a7ab" >> >> >> guacd[2659508]: DEBUG: Processing instruction: size >> >> >> guacd[2659508]: DEBUG: Processing instruction: audio >> >> >> guacd[2659508]: DEBUG: Processing instruction: video >> >> >> guacd[2659508]: DEBUG: Processing instruction: image >> >> >> guacd[2659508]: DEBUG: Processing instruction: timezone >> >> >> guacd[2659508]: DEBUG: Processing instruction: name >> >> >> guacd[2659508]: INFO: User "@ca7f6e87-53c6-4b6b-be2c-9e28255a04d9" >> >> >> joined connection "�@�" (1 users now present) >> >> >> guacd[2659508]: DEBUG: Client is using protocol version >> >> >> "VERSION_1_5_0" >> >> >> guacd[2659316]: ERROR: User is not responding. >> >> >> guacd[2659316]: INFO: User "@04f87cbf-6f45-4785-897f-5df0cdfd8fbc" >> >> >> disconnected (0 users remain) >> >> >> guacd[2659316]: INFO: Last user of connection "�!A�" disconnected >> >> >> guacd[2659316]: DEBUG: Requesting termination of client... >> >> >> double free or corruption (out) >> >> >> >> >> >> guacd[2658943]: INFO: Connection >> >> >> "$0eb617c4-ec41-46a0-9be9-7d0705aea227" removed. >> >> >> guacd[2658943]: DEBUG: Unable to request termination of client >> >> >> process: No such process >> >> >> guacd[2658943]: DEBUG: All child processes for connection >> >> >> "$0eb617c4-ec41-46a0-9be9-7d0705aea227" have been terminated. >> >> >> guacd[2659508]: ERROR: User is not responding. >> >> >> guacd[2659508]: INFO: User "@ca7f6e87-53c6-4b6b-be2c-9e28255a04d9" >> >> >> disconnected (0 users remain) >> >> >> guacd[2659508]: INFO: Last user of connection "�@�" disconnected >> >> >> guacd[2659508]: DEBUG: Requesting termination of client... >> >> >> double free or corruption (out) >> >> >> guacd[2658943]: INFO: Connection >> >> >> "$ad924c87-097e-4f1b-b0ab-8e3788c0a7ab" removed. >> >> >> guacd[2658943]: DEBUG: Unable to request termination of client >> >> >> process: No such process >> >> >> guacd[2658943]: DEBUG: All child processes for connection >> >> >> "$ad924c87-097e-4f1b-b0ab-8e3788c0a7ab" have been terminated. >> >> >> >> >> > >> >> > There are a few things that jump out to me here: >> >> > * First, the connection name or UUID appears to be mangled, as if >> >> > something is getting messed up with that. I'm not sure if this is an >> >> > artifact of copy/paste in e-mail, or if it really shows up that way in >> >> > the log? >> >> > * Second, something is stopping traffic between Guacamole Client and >> >> > guacd. It's not entirely clear what, but the "User is not responding" >> >> > message indicates that guacd has stopped receiving its regular pings >> >> > from the client-side. This is likely related to the next issue (the >> >> > double-free or corruption) in some way or another, though it isn't >> >> > exactly clear why. >> >> > * Finally, the double free or corruption message is interesting as it >> >> > indicates that we've a bug somewhere in the code that is trying to free >> >> > something that has already been freed. Whether this is causing the >> >> > issues you're seeing or is just a byproduct or unrelated bug is unclear. >> >> > >> >> > The next things I'd suggest are: >> >> > * Look for indications that you're getting a segfault in the guacd >> >> > process somewhere - any message in dmesg or other log facilities that >> >> > indicate that the guacd process is crashing? If so, get a stack trace >> >> > of that crash and see if you can post the contents of the stack back >> >> > here. >> >> > * Look at network traffic between Guacamole Client and guacd, and >> >> > between guacd and the SSH server, and see if something is shutting down >> >> > the connection for some reason. The fact that guacd is saying the >> >> > client stopped responding indicates the potential that something >> >> > network-related may be amiss. >> >> > * Look at the Guacamole Client logs (Tomcat) and see if there's >> >> > anything in those logs that indicates a reason why the conversation >> >> > between the browser and guacd is getting shut down. You may also need >> >> > to put Guacamole Client into debug mode to see better messages related >> >> > to that. >> >> > >> >> > -Nick >> >> >> >> --------------------------------------------------------------------- >> >> To unsubscribe, e-mail: [email protected] >> >> For additional commands, e-mail: [email protected] >> >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
