Arista Multilayer Switches used for nonlocal maintenance sessions must implement cryptographic mechanisms to protect the confidentiality of nonlocal maintenance and diagnostic communications.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-60871	AMLS-NM-000350	SV-75329r1_rule		Medium

Description
This requires the use of secure protocols instead of their unsecured counterparts, such as SSH instead of telnet, SCP instead of FTP, and HTTPS instead of HTTP.

STIG	Date
Arista MLS DCS-7000 Series NDM Security Technical Implementation Guide	2019-09-30

Details

Check Text ( C-61819r1_chk )
Determine if the network device uses secure protocols instead of their unsecured counterparts. If any unsecured maintenance protocols are in use (e.g., telnet, FTP, HTTP) and these protocols are not wrapped in a secure tunnel, this is a finding. Validate by checking that unsecure protocols are either disabled or wrapped in SSH tunnels. Executing a "show run" command will provide a means to validate this config. From the output of this command, verify that there is no statement enabling telnet, no statement enabling FTP, no statement enabling HTTP, and no statement enabling the API, or the API is configured to use only HTTPS.

Check Text ( C-61819r1_chk )

Determine if the network device uses secure protocols instead of their unsecured counterparts.

If any unsecured maintenance protocols are in use (e.g., telnet, FTP, HTTP) and these protocols are not wrapped in a secure tunnel, this is a finding.

Validate by checking that unsecure protocols are either disabled or wrapped in SSH tunnels.

Executing a "show run" command will provide a means to validate this config. From the output of this command, verify that there is no statement enabling telnet, no statement enabling FTP, no statement enabling HTTP, and no statement enabling the API, or the API is configured to use only HTTPS.

Fix Text (F-66583r1_fix)
Configure the network device to use secure protocols instead of their unsecured counterparts. Configuration Example: Disable unsecure protocols. configure management telnet shutdown exit management api http-commands no protocol http protocol https exit Other protocols (FTP) can be denied using AAA and RBAC. For connections that require use of these maintenance protocols, creation of SSH tunnels can fulfill this security requirement. This is summarized here and available at length in the Common Criteria guidance document. Configuration Example: management ssh tunnel NEW local port 514 ssh-server syslogServer user authuser port 22 remote host localhost port 514 no shutdown

Fix Text (F-66583r1_fix)

Configure the network device to use secure protocols instead of their unsecured counterparts.

Configuration Example:

Disable unsecure protocols.
configure
management telnet
shutdown
exit
management api http-commands
no protocol http
protocol https
exit

Other protocols (FTP) can be denied using AAA and RBAC. For connections that require use of these maintenance protocols, creation of SSH tunnels can fulfill this security requirement. This is summarized here and available at length in the Common Criteria guidance document.

Configuration Example:

management ssh
tunnel NEW
local port 514
ssh-server syslogServer user authuser port 22
remote host localhost port 514
no shutdown