File not found on clean install

[stevenagy88]

Hi,

After a clean install of Zabbix 7.4 on a LAMP stack on Ubuntu 24,04 with PHP 8.4, following the guide at https://www.zabbix.com/download?zabb...ysql&ws=apache, I am getting a page saying "File not found." at http://[server_ip]/zabbix. Apache, PHP and MariaDB are all running. What am I missing?

Thanks,
Steve Nagy

[Markku]

The usual reason for that error is not restarting apache2 service. Did you check that you restarted it?

Also, your link leads to Alma Linux install guide.

Markku

[stevenagy88]

Hi,

I copied the wrong link, sorry. The installation was done using this link:

https://www.zabbix.com/download?zabbix=7.4&os_distribution=ubuntu&os_version=24.04&components=server_frontend_agent&db=mysql&ws=apache

Apache is running, also evidenced by the fact that a web page is loaded, but with the text "File not found."

Any suggestions?

Thanks,
Steve Nagy

[Markku]

Note that any new Apache configuration files (like the ones Zabbix UI provides) are not automatically loaded by Apache. That's why I asked about restarting Apache, so can you confirm that?

Markku

[stevenagy88]

I just restarted Apache again, to be sure. No changes in the web access.

Steve

[stevenagy88]

I did a reload of the server and a clean install of Ubuntu 24.04, Apache, MariaDB and PHP 8.4 and installed Zabbix 7.4 as root following these instructions:

https://www.zabbix.com/download?zabbix=7.4&os_distribution=ubuntu&os_version=24.04&components=server_frontend_agent&db=mysql&ws=apache

Here is my /etc/apache2/conf-enabled/zabbix.conf, with an alias pointing to the correct directory:

root@monitor:~# cat /etc/apache2/conf-enabled/zabbix.conf
# Define /zabbix alias, this is the default
<IfModule mod_alias.c>
Alias /zabbix /usr/share/zabbix/ui
</IfModule>

<Directory "/usr/share/zabbix/ui">
Options FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all

<IfModule mod_php.c>
php_value max_execution_time 300
php_value memory_limit 128M
php_value post_max_size 16M
php_value upload_max_filesize 2M
php_value max_input_time 300
php_value max_input_vars 10000
php_value always_populate_raw_post_data -1
</IfModule>

<IfModule mod_php7.c>
php_value max_execution_time 300
php_value memory_limit 128M
php_value post_max_size 16M
php_value upload_max_filesize 2M
php_value max_input_time 300
php_value max_input_vars 10000
php_value always_populate_raw_post_data -1
</IfModule>
</Directory>

<Directory "/usr/share/zabbix/ui/conf">
Order deny,allow
Deny from all
<files *.php>
Order deny,allow
Deny from all
</files>
</Directory>

<Directory "/usr/share/zabbix/ui/app">
Order deny,allow
Deny from all
<files *.php>
Order deny,allow
Deny from all
</files>
</Directory>

<Directory "/usr/share/zabbix/ui/include">
Order deny,allow
Deny from all
<files *.php>
Order deny,allow
Deny from all
</files>
</Directory>

<Directory "/usr/share/zabbix/ui/local">
Order deny,allow
Deny from all
<files *.php>
Order deny,allow
Deny from all
</files>
</Directory>

<Directory "/usr/share/zabbix/ui/vendor">
Order deny,allow
Deny from all
<files *.php>
Order deny,allow
Deny from all
</files>
</Directory>
root@monitor:~#

I checked that mod_alias is available:

root@monitor:~# apache2ctl -M | grep alias
alias_module (shared)
root@monitor:~#

After installation, I restarted Apache. http://[ip] is accessible, but http://[ip]/zabbix/ shows a page saying 'File not found', In order to eliminate potential permission issues, I tried changed ownership of /usr/share/zabbix and all files and subfolders to www-data:www-data, but that made no difference.

What am I missing?

[Markku]

I don't know, works here when installed on a new Ubuntu 24.04 host.

root@ubuntutest2404:~# curl http://10.0.200.11/zabbix/ -I
HTTP/1.1 302 Found
Date: Mon, 14 Jul 2025 16:31:05 GMT
Server: Apache/2.4.58 (Ubuntu)
Location: setup.php
Content-Type: text/html; charset=UTF-8

root@ubuntutest2404:~# ls -l /etc/apache2/conf-enabled/zabbix.conf
lrwxrwxrwx 1 root root 29 Jul 14 16:25 /etc/apache2/conf-enabled/zabbix.conf -> ../conf-available/zabbix.conf
root@ubuntutest2404:~# ls -l /etc/apache2/conf-available/zabbix.conf
lrwxrwxrwx 1 root root 23 Jul 14 16:25 /etc/apache2/conf-available/zabbix.conf -> /etc/zabbix/apache.conf
root@ubuntutest2404:~# ls -l /etc/zabbix/apache.conf
-rw-r--r-- 1 root root 1764 Jun 30 10:28 /etc/zabbix/apache.conf
root@ubuntutest2404:~# dpkg -l zabbix\*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===================-=====================-============-================================================== =====================
ii zabbix-agent 1:7.4.0-1+ubuntu24.04 amd64 Zabbix network monitoring solution - agent
ii zabbix-apache-conf 1:7.4.0-1+ubuntu24.04 all Zabbix network monitoring solution - apache configuration for front-end
ii zabbix-frontend-php 1:7.4.0-1+ubuntu24.04 all Zabbix network monitoring solution - PHP front-end
un zabbix-nginx-conf <none> <none> (no description available)
ii zabbix-release 1:7.4-1+ubuntu24.04 all Zabbix official repository configuration
ii zabbix-server-mysql 1:7.4.0-1+ubuntu24.04 amd64 Zabbix network monitoring solution - server (MySQL)
un zabbix-server-pgsql <none> <none> (no description available)
ii zabbix-sql-scripts 1:7.4.0-1+ubuntu24.04 all Zabbix network monitoring solution - sql-scripts
root@ubuntutest2404:~#

Markku

[stevenagy88]

This is what I am seeing:

steve@Steves-MacBook-Pro-2 ~ % curl http://144.202.21.89/zabbix/ -I
HTTP/1.1 404 Not Found
Date: Wed, 16 Jul 2025 17:47:06 GMT
Server: Apache/2.4.58 (Ubuntu)
Content-Type: text/html; charset=UTF-8

steve@Steves-MacBook-Pro-2 ~ % curl http://144.202.21.89/ -I
HTTP/1.1 200 OK
Date: Wed, 16 Jul 2025 17:47:13 GMT
Server: Apache/2.4.58 (Ubuntu)
Content-Type: text/html; charset=UTF-8

steve@Steves-MacBook-Pro-2 ~ %

root@monitor:~# ls -l /etc/apache2/conf-enabled/zabbix.conf
lrwxrwxrwx 1 root root 29 Jul 13 21:55 /etc/apache2/conf-enabled/zabbix.conf -> ../conf-available/zabbix.conf
root@monitor:~# ls -l /etc/apache2/conf-available/zabbix.conf
lrwxrwxrwx 1 root root 23 Jul 13 21:55 /etc/apache2/conf-available/zabbix.conf -> /etc/zabbix/apache.conf
root@monitor:~# ls -l /etc/zabbix/apache.conf
-rw-r--r-- 1 root root 1764 Jun 30 10:28 /etc/zabbix/apache.conf
root@monitor:~# dpkg -l zabbix\*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===================-=====================-============-====================>
ii zabbix-agent 1:7.4.0-1+ubuntu24.04 amd64 Zabbix network monit>
ii zabbix-apache-conf 1:7.4.0-1+ubuntu24.04 all Zabbix network monit>
ii zabbix-frontend-php 1:7.4.0-1+ubuntu24.04 all Zabbix network monit>
un zabbix-nginx-conf <none> <none> (no description avai>
ii zabbix-release 1:7.4-1+ubuntu24.04 all Zabbix official repo>
ii zabbix-server-mysql 1:7.4.0-1+ubuntu24.04 amd64 Zabbix network monit>
un zabbix-server-pgsql <none> <none> (no description avai>
ii zabbix-sql-scripts 1:7.4.0-1+ubuntu24.04 all Zabbix network monit>​

[Markku]

Right. I'd just start messing around with apache.conf to find out if Apache for some reason ignores the file or if there is some other reason for it to not access files in /usr/share/zabbix/ui.

Markku