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The system must set maximum number of half-open TCP connections to 4096.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-216141 | SOL-11.1-050110 | SV-216141r603268_rule | Medium |
| 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. |
| STIG | Date |
|---|---|
| Solaris 11 X86 Security Technical Implementation Guide | 2020-12-04 |
Details
| Check Text ( C-17379r372805_chk ) |
|---|
| 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 Text (F-17377r372806_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 |