The Apache HTTP Server, colloquially called Apache, is free and open-source cross-platform web server.

https://httpd.apache.org/

Activate SSL

Activate SSL Site Config

Allow full access to the Apache subdirectory

Apache Tuning Tips

Authentication

Configure

Create a maintenance page

Disable SSL

Disable SSL v2/v3 support

Download Apache directory listings recursively

Error apr_sockaddr_info_get() failed

Example configuration file

Extract all user agents from Apache logs

Fix for IE page can not be displayed error

Get the originating host ip

Harden Apache

Hide web server version from appearing in http header

Install Apache

Install mod_security and mod_evasive

List Loaded Modules

Prevent Apache Killer

Redirect HTTP to HTTPS

Restart Apache

Restrict Apache Information Leakage

Rewrite Rule for root Directory

Setting up HSTS in Apache

SSL

Troubleshooting

Use .htaccess to hard-block spiders and crawlers

Use password protected certificates

Virtual Hosts

Virtual host debug

https://help.ubuntu.com/lts/serverguide/httpd.html