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The web server must restrict inbound connections from nonsecure zones.


Finding ID Version Rule ID IA Controls Severity
V-55961 SRG-APP-000315-WSR-000004 SV-70215r1_rule Medium
Remote access to the web server is any access that communicates through an external, non-organization-controlled network. Remote access can be used to access hosted applications or to perform management functions. A web server can be accessed remotely and must be capable of restricting access from what the DoD defines as nonsecure zones. Nonsecure zones are defined as any IP, subnet, or region that is defined as a threat to the organization. The nonsecure zones must be defined for public web servers logically located in a DMZ, as well as private web servers with perimeter protection devices. By restricting access from nonsecure zones, through internal web server access list, the web server can stop or slow denial of service (DoS) attacks on the web server.
Web Server Security Requirements Guide 2014-11-17


Check Text ( C-56531r2_chk )
Review the web server configuration to verify that the web server is restricting access from nonsecure zones.

If the web server is not configured to restrict access from nonsecure zones, then this is a finding.
Fix Text (F-60839r1_fix)
Configure the web server to block access from DoD-defined nonsecure zones.