The Arista network device must be configured to prohibit the use of all unnecessary and/or nonsecure functions, ports, protocols, and/or services.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
high	V-255952	SRG-APP-000142-NDM-000245	ARST-ND-000340	SV-255952r1043177_rule	2025-02-20	2

Description
To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable unused or unnecessary physical and logical ports/protocols on information systems. Network devices are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., email and web services); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the network device must support the organizational requirements providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved. Some network devices have capabilities enabled by default; if these capabilities are not necessary, they must be disabled. If a particular capability is used, then it must be documented and approved.

Description

To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable unused or unnecessary physical and logical ports/protocols on information systems. Network devices are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., email and web services); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the network device must support the organizational requirements providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved. Some network devices have capabilities enabled by default; if these capabilities are not necessary, they must be disabled. If a particular capability is used, then it must be documented and approved.

ℹ️ Check
Verify the Arista network device has telnet and https disabled. Step 1: Determine if telnet is disabled with the following command: switch#show management telnet Telnet status for Default VRF is disabled Telnet session limit is 20 Telnet session limit per host is 20 If telnet is enabled, this is a finding. Step 2: Determine if https is disabled with the following command: switch#show management http-server SSL Profile: none FIPS Mode: No QoS DSCP: 0 LogLevel: none CSP Frame Ancestor: None TLS Protocols: 1.0 1.1 1.2 VRF Server Status Enabled Services ------------------------------------------------------- default HTTPS: port 443 http-commands If Enabled Services in the output shows http-commands, this is a finding.

ℹ️ Check

Verify the Arista network device has telnet and https disabled. Step 1: Determine if telnet is disabled with the following command: switch#show management telnet Telnet status for Default VRF is disabled Telnet session limit is 20 Telnet session limit per host is 20 If telnet is enabled, this is a finding. Step 2: Determine if https is disabled with the following command: switch#show management http-server SSL Profile: none FIPS Mode: No QoS DSCP: 0 LogLevel: none CSP Frame Ancestor: None TLS Protocols: 1.0 1.1 1.2 VRF Server Status Enabled Services ------------------------------------------------------- default HTTPS: port 443 http-commands If Enabled Services in the output shows http-commands, this is a finding.

✔️ Fix
Configure the Arista network device to prohibit the use of all unnecessary and/or nonsecure functions, ports, protocols, and/or services. Step 1: Disable telnet with the following command: switch#config switch(config)#management telnet switch(config-mgmt-telnet)#shutdown switch(config-mgmt-telnet)#exit switch(config)#exit Step 2: Disable https with the following command: switch#config switch(config)#management api http-commands switch(config-mgmt-api-http-commands)#shutdown switch(config-mgmt-api-http-commands)#exit switch(config)#exit

✔️ Fix

Configure the Arista network device to prohibit the use of all unnecessary and/or nonsecure functions, ports, protocols, and/or services. Step 1: Disable telnet with the following command: switch#config switch(config)#management telnet switch(config-mgmt-telnet)#shutdown switch(config-mgmt-telnet)#exit switch(config)#exit Step 2: Disable https with the following command: switch#config switch(config)#management api http-commands switch(config-mgmt-api-http-commands)#shutdown switch(config-mgmt-api-http-commands)#exit switch(config)#exit