The system must set maximum number of half-open TCP connections to 4096.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-216378 | SRG-OS-000480 | SOL-11.1-050110 | SV-216378r959010_rule | 2024-11-25 | 3 |
| Description |
|---|
| This setting controls how many half-open connections can exist for a TCP port. It is necessary to control the number of completed connections to the system to provide some protection against denial of service attacks. |
| ℹ️ Check |
|---|
| Determine if the number of half open TCP connections is set to 4096. # ipadm show-prop -p _conn_req_max_q0 -co current tcp If the value of "4096" is not returned, this is a finding. |
| ✔️ Fix |
|---|
| The Network Management profile is required Configure maximum TCP connections for IPv4 and IPv6. # pfexec ipadm set-prop -p _conn_req_max_q0=4096 tcp |