The network element must only allow management connections for administrative access from hosts residing in to the management network.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-5611	NET1637	SV-15449r3_rule		Medium

Description
Remote administration is inherently dangerous because anyone with a sniffer and access to the right LAN segment, could acquire the device account and password information. With this intercepted information they could gain access to the infrastructure and cause denial of service attacks, intercept sensitive information, or perform other destructive actions.

STIG	Date
Perimeter Router Security Technical Implementation Guide Cisco	2017-06-27

Details

Check Text ( C-12914r4_chk )
Review the configuration and verify that management access to the device is allowed only from the management network address space. The configuration should look similar to the following: access-list 3 permit 192.168.1.10 log access-list 3 permit 192.168.1.11 log access-list 3 deny any log ….. line vty 0 4 access-class 3 in If management access can be gained from outside of the authorized management network, this is a finding.

Check Text ( C-12914r4_chk )

Review the configuration and verify that management access to the device is allowed only from the management network address space. The configuration should look similar to the following:

access-list 3 permit 192.168.1.10 log
access-list 3 permit 192.168.1.11 log
access-list 3 deny any log
…..
line vty 0 4
access-class 3 in

If management access can be gained from outside of the authorized management network, this is a finding.

Fix Text (F-5522r4_fix)
Configure an ACL or filter to restrict management access to the device from only the management network.