Zabbix web UI is not responding while server is up and running

[Serge229]

Hello,

I am running Zabbix 6.4.8 on an Oracle Linux 9.3 server.
The server is still running but the web UI has suddenly stopped responding (connection closed).
Obviously I made no change on any firewall (and no change at all).
Netstat shows that Zabbix is not listening at port TCP/443.
Restarting Zabbix service had no effect.
I assume there may be an issue on frontend config, but I am unsure.
Could someone help ?
Thanks in advance
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[root@VMLPZABIX01 adminuser]# cat /etc/os-release
NAME="Oracle Linux Server"
VERSION="9.3"
ID="ol"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"
VERSION_ID="9.3"
PLATFORM_ID="platform:el9"
PRETTY_NAME="Oracle Linux Server 9.3"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/oracle:linux:9:3:server"
HOME_URL="https://linux.oracle.com/"
BUG_REPORT_URL="https://github.com/oracle/oracle-linux"

ORACLE_BUGZILLA_PRODUCT="Oracle Linux 9"
ORACLE_BUGZILLA_PRODUCT_VERSION=9.3
ORACLE_SUPPORT_PRODUCT="Oracle Linux"
ORACLE_SUPPORT_PRODUCT_VERSION=9.3

[solution]

1 - Rename or delete the zabbix.conf.php file
2 - access the web-gui to restart the config wizard.


Wellington

[solution]

Install the frontend

For Apache and Mysql

dnf install zabbix-web-mysql zabbix-apache-conf

For Nginx and Mysql

dnf install zabbix-web-mysql zabbix-nginx-conf

links:
https://www.zabbix.com/download?zabb...oracle_linux&o s_version=9&components=server_frontend_agent&db=my sql&ws=apache

https://www.zabbix.com/documentation/6.4/en/manual/installation/frontend

Wellington

[Serge229]

Hello and thanks for your answer.

For the moment it doesn't work yet (I installed fronted, tested and reloaded nginx, restarted zabbix).
I also used the links you provided to reinstall frontend (modified command #dnf install zabbix-web-mysql zabbix-nginx-conf zabbix-sql-scripts zabbix-selinux-policy).
Server is OK but frontend web UI still not working

[Serge229]

Below are extracts of my Zabbix GUI conf file (zabbix.conf.php) and server conf file (zabbix_server.conf). I already changed values of $ZBX_SERVER and $ZBX_SERVER_PORT to web UI's IP (the one I used to connect) and 443 respectively, but nothing changed

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[Serge229]

Hello,

Few progresses made :

1. I re-installed nginx
2. Encountered errors about "invalid PID number", "permission denied for /etc/nginx.conf"
3. Solved the errors by changing listen to 80, server name to my web UI's IP and adding "index zabbix.php" just below server_name line
4. Then web UI shows again, but with an error : "Configuration file error. DB type is not set."

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[solution]

1 - Rename or delete the zabbix.conf.php file
2 - access the web-gui to restart the config wizard.


Wellington

[Serge229]

Hello Wellington,

I've just followed your advice and the web UI is back.
Many thanks !

Serge
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