Title

A private web server must be located on a separate controlled access subnet. (Cat II impact)

Discussion

Private web servers, which host sites that serve controlled access data, must be protected from outside threats in addition to insider threats. Insider threat may be accidental or intentional but, in either case, can cause a disruption in service of the web server. To protect the private web server from these threats, it must be located on a separate controlled access subnet and must not be a part of the public DMZ that houses the public web servers. It also cannot be located inside the enclave as part of the local general population LAN.

Check Content

This check verifies that the private web server is located on a separate controlled access subnet and is not a part of the public DMZ that houses the public web servers. In addition, the private web server needs to be isolated via a controlled access mechanism from the local general population LAN. Proposed Questions: What devices (i.e., router, switch, or firewall) lie between the web server and Internet connectivity? Is the private web server on a separate subnet? Is the private web server on a LAN with servers and workstations dedicated to functions not intended for public access? If the web server is not located inside the premise router, switch, or firewall and is not isolated via a controlled access mechanism from the general population LAN, this is a finding.

Fix Text

Isolate the private web server from the public DMZ and separate it from the internal general population LAN. This separation must have access control in place to protect the web server from internal threats.

Additional Identifiers

Rule ID: SV-33013r2_rule

Vulnerability ID: V-2243

Group Title:

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.