In rare circumstances you may come across the following error in your web browser when accessing one of the Nagios products:
Content Encoding Error
The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.
* Please contact the website owners to inform them of this problem.
Error 330 (net::ERR_CONTENT_DECODING_FAILED): Unknown error.
Resolution
The Apache web server requires zlib.output_compression to be configured to On in the /etc/php.ini file.
Execute the following command to open the file in vi:
vi /etc/php.ini
When using the vi editor, to make changes press i on the keyboard first to enter insert mode. Press Esc to exit insert mode.
To locate the line zlib.output_compression = type the following:
/output_compression =
This should take you directly to the line. Change the setting to On:
zlib.output_compression = On
When you have finished, save the changes in vi by typing:
:wq
and press Enter.
The last step is to restart the Apache service using one of the commands below:
RHEL 7 + | CentOS 7 + | Oracle Linux 7 +
systemctl restart httpd.service
Debian | Ubuntu 16/18/20
systemctl restart apache2.service
After the service has restarted the problem should no longer occur.
Final Thoughts
For any support related questions please visit the Nagios Support Forums at:
http://support.nagios.com/forum/
Article ID: 567
Created On: Tue, Mar 7, 2017 at 7:02 PM
Last Updated On: Thu, Mar 11, 2021 at 2:07 PM
Authored by: tlea
Online URL: https://support.nagios.com/kb/article/web-browser-reports-330-error-content-encoding-567.html