From APACHE 2.2 Server for UNIX Security Technical Implementation Guide
Part of WA00555
The Apache Listen directive specifies the IP addresses and port numbers the Apache web server will listen for requests. Rather than be unrestricted to listen on all IP addresses available to the system, the specific IP address or addresses intended must be explicitly specified. Specifically a Listen directive with no IP address specified, or with an IP address of zero’s should not be used. Having multiple interfaces on web servers is fairly common, and without explicit Listen directives, the web server is likely to be listening on an inappropriate IP address / interface that were not intended for the web server. Single homed system with a single IP addressed are also required to have an explicit IP address in the Listen directive, in case additional interfaces are added to the system at a later date.
Enter the following command: grep "Listen" /usr/local/apache2/conf/httpd.conf Review the results for the following directive: Listen For any enabled Listen directives ensure they specify both an IP address and port number. If the Listen directive is found with only an IP address, or only a port number specified, this is finding. If the IP address is all zeros (i.e. 0.0.0.0:80 or [::ffff:0.0.0.0]:80, this is a finding. If the Listen directive does not exist, this is a finding.
Edit the httpd.conf file and set the "Listen directive" to listen on a specific IP address and port.
Lavender hyperlinks in small type off to the right (of CSS
class id, if you view the page source) point to
globally unique URIs for each document and item. Copy the
link location and paste anywhere you need to talk
unambiguously about these things.
You can obtain data about documents and items in other
formats. Simply provide an HTTP header Accept:
text/turtle or
Accept: application/rdf+xml.
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