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How do I configure Apache HTTPD to listen on multiple ports under RHEL / Fedora / CentOS Linux Server?

Multiple ports can be configured via Listen directive under Apache web server. By default httpd listens on TCP port 80.

How to configure httpd to listen multiple ports?
Open configure file /etc/httpd/conf/httpd.conf and modify the Listen directive tells the server to accept incoming requests on the specified port. Multiple Listen directives may be used to specify a number of ports to listen to.

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