Create 'access-list' for use with 'line vty'

HighLevel 1Manual reviewcisco-ios

Description

Access lists control the transmission of packets on an interface, control Virtual Terminal Line (VTY) access, and restrict the contents of routing updates. The Cisco IOS software stops checking the extended access list after a match occurs. VTY ACLs control what addresses may attempt to log in to the router. Configuring VTY lines to use an ACL, restricts the sources where a user can manage the device. CIS assessment: Manual. Reported as SKIP with review instructions.

How it is checked

Audit method: Manual review

This recommendation cannot be checked automatically. A scan lists it with these instructions when you pass --include-manual.

CIS assessment: Manual. Perform the following to determine if the ACL is created: Verify the appropriate access-list definitions hostname#sh ip access-list <vty_acl_number>

How it is fixed

Fix method: Guidance or infrastructure patch

! Configure the VTY ACL that will be used to restrict management access to the device. access-list <vty_acl_number> permit tcp <vty_acl_block_with_mask> any access-list <vty_acl_number> permit tcp host <vty_acl_host> any deny ip any any log

Properties

Operating systems: Any
Tags: cisco-iosnetworkmanagement-plane
Reference: CIS Cisco IOS XE 17.x Benchmark v2.2.1 - 1.2.4 Create 'access-list' for use with 'line vty'