If the system is an anonymous FTP server, it must be isolated to the DMZ network.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4702	GEN004840	SV-37528r1_rule	ECSC-1	Medium

Description
Anonymous FTP is a public data service which is only permitted in a server capacity when located on the DMZ network.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2017-03-01

Details

Check Text ( C-36187r1_chk )
Use the command "ftp" to connect the system's FTP service. Attempt to log into this host with a user name of anonymous and a password of guest (also try the password of guest@mail.com). If the logon is not successful, this check is Not Applicable. Ask the SA if the system is located on a DMZ network. If the system is not located on a DMZ network, this is a finding.

Fix Text (F-31442r1_fix)
Remove anonymous ftp capability or move the system to a DMZ network.