The system must not respond to ICMP broadcast netmask requests.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-216371 | SRG-OS-000480 | SOL-11.1-050040 | SV-216371r959010_rule | 2024-11-25 | 3 |
| Description |
|---|
| By determining the netmasks of various computers in your network, an attacker can better map your subnet structure and infer trust relationships. |
| ℹ️ Check |
|---|
| Determine if the response to address mask broadcast is disabled. # ipadm show-prop -p _respond_to_address_mask_broadcast -co current ip If the output of this command is not "0", this is a finding. |
| ✔️ Fix |
|---|
| The Network Management profile is required. Disable responses to address mask broadcast. # pfexec ipadm set-prop -p _respond_to_address_mask_broadcast=0 ip |