Re: guacamole can't communicate with guacd
On Wed, Jan 31, 2024 at 10:48 PM wrote:
> Apparently there are two problems.
> The first is a ipv4 vs. ipv6 issue. If I use localhost in guacd.conf:
> [server]
> bind_host = localhost
> bind_port = 4822
>
> guacd binds to a ipv6 address and guacamola never finds it. Change
> guacd.conf to
> [server]
> bind_host = 127.0.0.1
> bind_port = 4822
>
> and guacamola now finds guacd.
>
>
Yes, this is definitely a known issue with systems that support both IPv4
and IPv6. Glad you got that resolved.
> Second problem:
> guacd can't find its vnc plugin. Again, systemctl status guacd yields:
> Jan 31 18:10:22 pi4dev guacd[5518]: Creating new client for protocol
> "vnc"
> Jan 31 18:10:22 pi4dev guacd[5518]: Connection ID is
> "$4e2159ab-c7ff-4243-884f-267cd3bd8ad2"
> Jan 31 18:10:22 pi4dev guacd[5567]: Cursor rendering: local
> Jan 31 18:10:22 pi4dev guacd[5567]: User
> "@6c10f1d1-cf63-404a-8479-e16259dcccbe" joined connection
> "$4e2159ab-c7ff-4243-8>
> Jan 31 18:10:22 pi4dev guacd[5567]: ConnectClientToTcpAddr6: connect
> Jan 31 18:10:22 pi4dev guacd[5567]: Unable to connect to VNC server
> Jan 31 18:10:22 pi4dev guacd[5567]: Unable to connect to VNC server.
> Jan 31 18:10:32 pi4dev guacd[5567]: User
> "@6c10f1d1-cf63-404a-8479-e16259dcccbe" disconnected (0 users remain)
> Jan 31 18:10:32 pi4dev guacd[5567]: Last user of connection
> "$4e2159ab-c7ff-4243-884f-267cd3bd8ad2" disconnected
> Jan 31 18:10:32 pi4dev guacd[5518]: Connection
> "$4e2159ab-c7ff-4243-884f-267cd3bd8ad2" removed.
Actually, guacd is finding the VNC plugin - if it weren't, you'd receive a
very specific message about it being unable to load the VNC protocol. What
you have, here, is guacd being unable to connect to your VNC server:
Jan 31 18:10:22 pi4dev guacd[5567]: ConnectClientToTcpAddr6: connect
Jan 31 18:10:22 pi4dev guacd[5567]: Unable to connect to VNC server
Jan 31 18:10:22 pi4dev guacd[5567]: Unable to connect to VNC server.
The first message, with ConnectClientToTcpAddr6, is actually from
libvncclient, which is a good indication that 1) guacd _is_ actually
correctly loading VNC support, and 2) that the VNC library is attempting to
make the connection. What I'm not sure about is the Addr6 - this may
indicate that libvncclient is resolving your VNC server to an IPv6 address,
and is failing to connect to that.
Next things to check would be:
* Start guacd in debug log mode ("-L debug" on the command line or
("log_level = debug" in the "[daemon]" section of guacd.conf)
* Verify your Guacamole connection settings have the correct hostname or IP
address and the correct port number for your VNC server.
* If it's a hostname, verify that you can correctly resolve it to the
expected IP address from the system running guacd.
* Verify that you can connect to that IP + Port combination from the
system running guacd, outside of Guacamole - you can do this by using
something like nc or telnet or tcping to attempt the connection and verify
that it works as expected.
* Verify that something like SELinux or AppArmor is not blocking guacd,
specifically, from making those outbound network connections.
-Nick
Re: guacamole can't communicate with guacd
Apparently there are two problems. The first is a ipv4 vs. ipv6 issue. If I use localhost in guacd.conf: [server] bind_host = localhost bind_port = 4822 guacd binds to a ipv6 address and guacamola never finds it. Change guacd.conf to [server] bind_host = 127.0.0.1 bind_port = 4822 and guacamola now finds guacd. Second problem: guacd can't find its vnc plugin. Again, systemctl status guacd yields: Jan 31 18:10:22 pi4dev guacd[5518]: Creating new client for protocol "vnc" Jan 31 18:10:22 pi4dev guacd[5518]: Connection ID is "$4e2159ab-c7ff-4243-884f-267cd3bd8ad2" Jan 31 18:10:22 pi4dev guacd[5567]: Cursor rendering: local Jan 31 18:10:22 pi4dev guacd[5567]: User "@6c10f1d1-cf63-404a-8479-e16259dcccbe" joined connection "$4e2159ab-c7ff-4243-8> Jan 31 18:10:22 pi4dev guacd[5567]: ConnectClientToTcpAddr6: connect Jan 31 18:10:22 pi4dev guacd[5567]: Unable to connect to VNC server Jan 31 18:10:22 pi4dev guacd[5567]: Unable to connect to VNC server. Jan 31 18:10:32 pi4dev guacd[5567]: User "@6c10f1d1-cf63-404a-8479-e16259dcccbe" disconnected (0 users remain) Jan 31 18:10:32 pi4dev guacd[5567]: Last user of connection "$4e2159ab-c7ff-4243-884f-267cd3bd8ad2" disconnected Jan 31 18:10:32 pi4dev guacd[5518]: Connection "$4e2159ab-c7ff-4243-884f-267cd3bd8ad2" removed. And yet I compiled guacamole with vnc support: guacamole-server version 1.5.4 Library status: freerdp2 no pango ... yes libavcodec .. yes libavformat.. yes libavutil ... yes libssh2 . yes libssl .. yes libswscale .. yes libtelnet ... no libVNCServer yes libvorbis ... no libpulse no libwebsockets ... yes libwebp . yes wsock32 . no Protocol support: Kubernetes yes RDP ... no SSH ... yes Telnet no VNC ... yes Services / tools: guacd .. yes guacenc yes guaclog yes FreeRDP plugins: no Init scripts: no Systemd units: no And the plugin libraries are in /usr/local/lib: jeh@pi4dev:/usr/local/lib $ ls cmake libguac-client-ssh.so.0.0.0 libguac-terminal.lalibopen62541.so.1.3.2 libguac.a libguac-client-vnc.a libguac-terminal.solibuldaq.a libguac-client-kubernetes.a libguac-client-vnc.la libguac-terminal.so.0 libuldaq.la libguac-client-kubernetes.lalibguac-client-vnc.so libguac-terminal.so.0.1.0 libuldaq.so libguac-client-kubernetes.solibguac-client-vnc.so.0 libmxml.a libuldaq.so.1 libguac-client-kubernetes.so.0 libguac-client-vnc.so.0.0.0 libmxml.so libuldaq.so.1.2.0 libguac-client-kubernetes.so.0.0.0 libguac.la libmxml.so.1 pkgconfig libguac-client-ssh.alibguac.so libmxml.so.1.6 pypy2.7 libguac-client-ssh.la libguac.so.23 libopen62541.a python2.7 libguac-client-ssh.so libguac.so.23.0.0 libopen62541.sopython3.11 libguac-client-ssh.so.0 libguac-terminal.a libopen62541.so.1 And according to ldconfig the libraries are known. jeh@pi4dev:/usr/local/lib $ ldconfig --print-cache | grep libguac libguac.so.23 (libc6,hard-float) => /usr/local/lib/libguac.so.23 libguac.so (libc6,hard-float) => /usr/local/lib/libguac.so libguac-terminal.so.0 (libc6,hard-float) => /usr/local/lib/libguac-terminal.so.0 libguac-terminal.so (libc6,hard-float) => /usr/local/lib/libguac-terminal.so libguac-client-vnc.so.0 (libc6,hard-float) => /usr/local/lib/libguac-client-vnc.so.0 libguac-client-vnc.so (libc6,hard-float) => /usr/local/lib/libguac-client-vnc.so libguac-client-ssh.so.0 (libc6,hard-float) => /usr/local/lib/libguac-client-ssh.so.0 libguac-client-ssh.so (libc6,hard-float) => /usr/local/lib/libguac-client-ssh.so libguac-client-kubernetes.so.0 (libc6,hard-float) => /usr/local/lib/libguac-client-kubernetes.so.0 libguac-client-kubernetes.so (libc6,hard-float) => /usr/local/lib/libguac-client-kubernetes.so So what's the problem? Clearly I'm missing something. Regards, Jim On 2024-01-30 19:20, jim...@porcine.com wrote: It appears to be a ipv4 vs. ipv6 issue. Here is what I get with systemctl status guacd after a failed attempt: Jan 30 15:54:04 pi4dev guacd[6014]: Creating new client for protocol "vnc" Jan 30 15:54:04 pi4dev guacd[6014]: Connection ID is "$ea3a9369-9157-428c-be87-3b0e08498367" Jan 30 15:54:04 pi4dev guacd[6061]: Cursor rendering: local Jan 30 15:54:04 pi4dev guacd[6061]: User "@d1cf66c3-9bb5-4a46-b8eb-82a718cae00f" joined
Re: guacamole can't communicate with guacd
On 1/30/24 16:20, jim...@porcine.com wrote: It appears to be a ipv4 vs. ipv6 issue. Here is what I get with systemctl status guacd after a failed attempt: Jan 30 15:54:04 pi4dev guacd[6014]: Creating new client for protocol "vnc" Jan 30 15:54:04 pi4dev guacd[6014]: Connection ID is "$ea3a9369-9157-428c-be87-3b0e08498367" Jan 30 15:54:04 pi4dev guacd[6061]: Cursor rendering: local Jan 30 15:54:04 pi4dev guacd[6061]: User "@d1cf66c3-9bb5-4a46-b8eb-82a718cae00f" joined connection "$ea3a9369-9157-428c-be87-3b0e08498367" (1 users > Jan 30 15:54:04 pi4dev guacd[6061]: ConnectClientToTcpAddr6: connect Jan 30 15:54:04 pi4dev guacd[6061]: Unable to connect to VNC server Jan 30 15:54:04 pi4dev guacd[6061]: Unable to connect to VNC server. Do you have a VNC server running and accepting connections at the hostname/address and port you've specified? According to the logs above, the web application is not having any issue connecting to guacd - that much is working fine. It's the attempt to connect to the VNC server that's failing. - Mike - To unsubscribe, e-mail: user-unsubscr...@guacamole.apache.org For additional commands, e-mail: user-h...@guacamole.apache.org
guacamole can't communicate with guacd
It appears to be a ipv4 vs. ipv6 issue. Here is what I get with systemctl status guacd after a failed attempt: Jan 30 15:54:04 pi4dev guacd[6014]: Creating new client for protocol "vnc" Jan 30 15:54:04 pi4dev guacd[6014]: Connection ID is "$ea3a9369-9157-428c-be87-3b0e08498367" Jan 30 15:54:04 pi4dev guacd[6061]: Cursor rendering: local Jan 30 15:54:04 pi4dev guacd[6061]: User "@d1cf66c3-9bb5-4a46-b8eb-82a718cae00f" joined connection "$ea3a9369-9157-428c-be87-3b0e08498367" (1 users > Jan 30 15:54:04 pi4dev guacd[6061]: ConnectClientToTcpAddr6: connect Jan 30 15:54:04 pi4dev guacd[6061]: Unable to connect to VNC server Jan 30 15:54:04 pi4dev guacd[6061]: Unable to connect to VNC server. Jan 30 15:54:04 pi4dev guacd[6061]: User "@d1cf66c3-9bb5-4a46-b8eb-82a718cae00f" disconnected (0 users remain) Jan 30 15:54:04 pi4dev guacd[6061]: Last user of connection "$ea3a9369-9157-428c-be87-3b0e08498367" disconnected Jan 30 15:54:04 pi4dev guacd[6014]: Connection "$ea3a9369-9157-428c-be87-3b0e08498367" removed. I've already found as many "localhost" that I can find and replaced them with "127.0.0.1" Here is guacd.conf: [server] bind_host = 127.0.0.1 bind_port = 4822 and user-mapping.xml vnc 127.0.0.1 5900 VNCPASS vnc 127.0.0.1 5901 VNCPASS vnc otherhost 5900 VNCPASS Any suggestions? Regards, Jim - To unsubscribe, e-mail: user-unsubscr...@guacamole.apache.org For additional commands, e-mail: user-h...@guacamole.apache.org
