Rule version BCAS-ND-001750 · STIG v1 · 2026-09-16
DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity.
This requirement addresses the configuration of network devices to mitigate the impact of DoS attacks that have occurred or are ongoing on device availability. For each network device, known and potential DoS attacks must be identified and solutions for each type implemented. A variety of technologies exist to limit or, in some cases, eliminate the effects of DoS attacks (e.g., limiting processes or restricting the number of sessions the device opens at one time). Employing increased capacity and bandwidth, combined with service redundancy, may reduce the susceptibility to some DoS attacks.
The security safeguards cannot be defined at the DoW level because they vary according to the capabilities of the individual network devices and the security controls applied on the adjacent networks (for example, firewalls performing packet filtering to block DoS attacks).
Satisfies: SRG-APP-000435-NDM-000315, SRG-APP-000038-NDM-000213
Verify a web-management access-list is configured with the following steps:
1. Log on to the SSH CLI with an administrative account. 2. Enter "show running-config web-management access-list". (Example IPv4: 10.1.0.128/24) (Example IPv6: 2001:db8:1::1/128)
If there is no output, this is a finding.
Configure the web-management access-list with approved IP addresses or subnets with the following steps:
1. Log on to the SSH CLI with an administrative account. 2. Enter "enable" and provide the password. 3. Enter "configure terminal". 4. Add approved IPv4 or IPv6 addresses or subnets using CIDR notation by entering "web-management access-list [IPADDRESS-OR-SUBNET]". (Example IPv4: 10.1.0.128/24) (Example IPv6: 2001:db8:1::1/128) 5. Enter "exit" to return to the config context, and then enter "exit" again to leave configuration mode.