zabbix.conf redirect to another port - apache

Question

I'm having trouble understanding how to reconfigure the initial zabbix.conf file to not hijack port 80 out of the box.
Here is the default zabbix.conf provided by the application:
#
# Zabbix monitoring system php web frontend
#
Alias /zabbix /usr/share/zabbix
<Directory "/usr/share/zabbix">
Options FollowSymLinks
AllowOverride None
Require all granted
<IfModule mod_php5.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 always_populate_raw_post_data -1
# php_value date.timezone Europe/Riga
</IfModule>
</Directory>
<Directory "/usr/share/zabbix/conf">
Require all denied
</Directory>
<Directory "/usr/share/zabbix/app">
Require all denied
</Directory>
<Directory "/usr/share/zabbix/include">
Require all denied
</Directory>
<Directory "/usr/share/zabbix/local">
Require all denied
</Directory>
What I want to be able to do is configure my zabbix similar to how I've done other apps on my server something like this. There are actually already 2 apps on this server. jira which is a Reverse Proxy on port 8080 and confluence which is a Reverse Proxy on port 8090. I want to have zabbix on a Reverse Proxy on another port, say 8070.:
<VirtualHost *:80>
ServerName zabbix.domain.com
ServerAlias zabbix
Redirect / https://zabbix.domain.com
</VirtualHost>
<VirtualHost *:443>
ServerName zabbix.domain.com
ServerAlias zabbix
Include ssl/default/ssl.cfg
ProxyPass / http://localhost:8070/
ProxyPassReverse / http://localhost:8070/
</VirtualHost>
The problem is this doesn't work because Zabbix runs on the assumption that nothing else is using port 80.
Doing something like this just gives a page not displayed
Alias /zabbix /usr/share/zabbix
<Directory "/usr/share/zabbix">
Options FollowSymLinks
AllowOverride None
Require all granted
<IfModule mod_php5.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 always_populate_raw_post_data -1
# php_value date.timezone Europe/Riga
</IfModule>
</Directory>
<Directory "/usr/share/zabbix/conf">
Require all denied
</Directory>
<Directory "/usr/share/zabbix/app">
Require all denied
</Directory>
<Directory "/usr/share/zabbix/include">
Require all denied
</Directory>
<Directory "/usr/share/zabbix/local">
Require all denied
</Directory>
<VirtualHost *:80>
ServerName zabbix.domain.com
ServerAlias zabbix
Redirect / https://zabbix.domain.com
</VirtualHost>
<VirtualHost *:443>
ServerName zabbix.domain.com
ServerAlias zabbix
Include ssl/default/ssl.cfg
ProxyPass / http://localhost:80/
ProxyPassReverse / http://localhost:80/
</VirtualHost>

Answer 1

I was so close! Doing this -
<VirtualHost *:80>
ServerName zabbix.domain.com
ServerAlias zabbix
Alias /zabbix /usr/share/zabbix
<Directory "/usr/share/zabbix">
Options FollowSymLinks
AllowOverride None
Require all granted
<IfModule mod_php5.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 always_populate_raw_post_data -1
php_value date.timezone America/Toronto
</IfModule>
</Directory>
<Directory "/usr/share/zabbix/conf">
Require all denied
</Directory>
<Directory "/usr/share/zabbix/app">
Require all denied
</Directory>
<Directory "/usr/share/zabbix/include">
Require all denied
</Directory>
<Directory "/usr/share/zabbix/local">
Require all denied
</Directory>
</VirtualHost>
Allowed me to hit the URL of http://zabbix.domain.com/zabbix and get the site.

Answer 2

Actually you should change this in Apache conf. You can search for it like so:
grep -rE "\b80\b" /etc/apache2
You will get a list of places to change. That would most probably be something like Listen 80 and <VirtualHost *:80>.
Note that original zabbix configuration doesn't have any configuration for ports.
So after changing what you need you should restart apache and make sure it is running:
service apache2 restart
service apache2 status
URLs
Also note that you don't need ServerName in VirtualHost. Zabbix will only "hijack" the "zabbix" folder and only on specific port on which apache is listening. So if you changed 80 to 8081 you should see zabbix running on:
http://localhost:8081/zabbix/
And if your machine is accessible from external domain like zabbix.domain.com then this will work fine:
http://zabbix.domain.com:8081/zabbix/