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The systems access control program must be configured to grant or deny system access to specific hosts.


Overview

Finding ID Version Rule ID IA Controls Severity
V-12030 GEN006620 SV-45931r1_rule Medium
Description
If the system's access control program is not configured with appropriate rules for allowing and denying access to system network resources, services may be accessible to unauthorized hosts.
STIG Date
SUSE Linux Enterprise Server v11 for System z 2016-12-20

Details

Check Text ( C-43235r1_chk )
Check for the existence of the "/etc/hosts.allow" and "/etc/hosts.deny" files.

Procedure:
# ls -la /etc/hosts.allow
# ls -la /etc/hosts.deny

If either file does not exist, this is a finding.

Check for the presence of a "default deny" entry.

Procedure:
# grep "ALL: ALL" /etc/hosts.deny

If the "ALL: ALL" entry is not present the "/etc/hosts.deny" file, any TCP service from a host or network not matching other rules will be allowed access. If the entry is not in "/etc/hosts.deny", this is a finding.
Fix Text (F-39307r1_fix)
Edit the "/etc/hosts.allow" and "/etc/hosts.deny" files to configure access restrictions.