| SYSTEM INFORMATION | |
|---|---|
| OS type and version | Ubuntu Linux 22.04.4 |
| Webmin version | 2.105 |
Following configuration advice from the Webmin FAQ #can-i-run-webmin-or-usermin-behind-reverse-proxy, I managed to get webmin functional via https://webmin.mydomain.xx.
Terminal (in the Tools section) is not functioning however, although it was fine without proxy.
Behaviour is that the black terminal window shows briefly, but is replaced with the next:
Clicking the button in the right-hand top shows a black overlay window with “CONNECTING …”
This issue has been reported earlier, but I could not find any relevant solution. Most recognition was with this issue on Virtualmin. But that resolved itself automagically.
The complete relevant section in the Apache VirtualHost configuration is:
# Enable the usage of the SSL/TLS protocol engines
SSLEngine on
SSLProxyEngine on
#
ProxyPass /.well-known !
# Proxying both HTTP and websockets at the same time, where the websockets URL's are not websocket-only
# or not known in advance
ProxyPass / https://localhost:10000/
ProxyPassReverse / https://localhost:10000/
RewriteEngine on
RewriteCond %{HTTP:Upgrade} websocket [NC]
RewriteCond %{HTTP:Connection} upgrade [NC]
RewriteRule ^/?(.*) "wss://localhost:10000/$1" [P,L]
There is one file in /tmp/.webmin:
ws-555.out:
Running shell '/bin/bash -bash' with pid 403287
listening on port 555
timeout waiting for connection at /usr/share/webmin/xterm/shellserver.pl line 103.
Only two lines with the timestamp of the failing terminal in /var/webmin/miniserv.log:
<public domain ip> - <myusername> [23/Feb/2024:10:18:16 +0100] "GET /index.cgi/?xhr-info=1 HTTP/1.1" 200 13653
<public domain ip> - <myusername> [23/Feb/2024:10:24:44 +0100] "POST /xterm/ HTTP/1.1" 200 4119
No lines with the relevant timestamp in /var/webmin/webmin.log.
The browser console gives the next error:
Firefox can’t establish a connection to the server at wss://<mydomainname>/webmin/xterm/ws-555.
Hostname for WebSocket connections is set to Manual <mydomainname>/webmin.