Envoy must drop connections to disconnected clients.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-256737 | VCRP-70-000001 | SV-256737r889149_rule | CCI-000054 | medium |
| Description | ||||
| Envoy client connections that are established but no longer connected can consume resources that might otherwise be required by active connections. It is a best practice to terminate connections that are no longer connected to an active client. Envoy is hard coded to drop connections after three minutes of idle time. The absence of any "tcpKeepAliveTimeSec" settings means this default is in effect. This configuration must be verified and maintained. | ||||
| STIG | Date | |||
| VMware vSphere 7.0 vCenter Appliance RhttpProxy Security Technical Implementation Guide | 2023-02-21 | |||
Details
Check Text (C-256737r889149_chk)
At the command prompt, run the following command:
# xmllint --xpath '/config/envoy/L4Filter/tcpKeepAliveTimeSec/text()' /etc/vmware-rhttpproxy/config.xml
Expected result:
180
or
XPath set is empty
If the output does not match the expected result, this is a finding.
Fix Text (F-60355r889148_fix)
Navigate to and open:
/etc/vmware-rhttpproxy/config.xml
Locate the <config>/<envoy>/<L4Filter> block and configure <tcpKeepAliveTimeSec> as follows:
<tcpKeepAliveTimeSec>180</tcpKeepAliveTimeSec>
Restart the service for changes to take effect.
# vmon-cli --restart rhttpproxy