SYMP-AG-000570 - Symantec ProxySG must deny network communications traffic by default and allow network communications traffic by exception (i.e., deny all, permit by exception).

Information

A deny-all, permit-by-exception network communications traffic policy ensures that only connections that are essential and approved are allowed.

As a managed interface, the ALG must block all inbound and outbound network communications traffic to the application being managed and controlled unless a policy filter is installed to explicitly allow the traffic. The allow policy filters must comply with the site's security policy.

This requirement applies to both inbound and outbound network communications traffic. All inbound and outbound traffic for which the ALG is acting as an intermediary or proxy must be denied by default.

Solution

Configure the ProxySG to deny all traffic by default.

1. Log on to the Web Management Console.
2. Browse to Configuration >> Policy >> Policy Options.
3. Set the 'Default Proxy Policy' to 'Deny' and click 'Apply'.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_SYM_ProxySG_Y20M04_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7(5), CAT|II, CCI|CCI-001109, Rule-ID|SV-104281r1_rule, STIG-ID|SYMP-AG-000570, Vuln-ID|V-94327

Plugin: BlueCoat

Control ID: bf14d190a7ebd76838d126c5e73d72fec9764ea18338254adeab987c59aa0820