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Hide the Apache Web Server Version number with ServerSignature and ServerTokens directives

You can easily hide Apche (httpd) version number and other information. There are two config directives that controls Apache version. The ServerSignature directive adds a line containing the Apache HTTP Server server version and the ServerName to any server-generated documents, such as error messages sent back to clients. ServerSignature is set to on by default. The ServerTokens directive controls whether Server response header field which is sent back to clients includes a description of the generic OS-type of the server as well as information about compiled-in modules. By setting this to Prod you only displays back Apache as server name and no version number displayed back.

Open your httpd.conf file using text editor such as vi:
vi httpd.conf

Append/modify config directive as follows:
ServerSignature Off
ServerTokens Prod

Save and close the file. Restart Apache web server:
# /etc/init.d/httpd restart

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