MSS: (KeepAliveTime) How often keep-alive packets are sentID: oval:org.secpod.oval:def:35000 | Date: (C)2016-06-10 (M)2023-12-13 |
Class: COMPLIANCE | Family: windows |
MSS: (KeepAliveTime) How often keep-alive packets are sent in milliseconds
Counter Measure:
Configure the MSS: (KeepAliveTime) How often keep-alive packets are sent in milliseconds (300,000 is recommended) entry to a value of 300000 or 5 minutes.
The possible values for this registry entry are:
? 1 through 0xFFFFFFFF. The default configuration is 7,200,000 (two hours).
In the SCE UI, the following list of options appears:
? 150000 or 2.5 minutes
? 300000 or 5 minutes (recommended)
? 600000 or 10 minutes
? 1200000 or 20 minutes
? 2400000 or 40 minutes
? 3600000 or 1 hour
? 7200000 or 2 hours (default value)
? Not Defined
Potential Impact:
Keep-alive packets are not sent by default by Windows. However, some applications may configure the TCP stack flag that requests keep-alive packets. For such configurations, you can lower this value from the default setting of two hours to five minutes to disconnect inactive sessions more quickly.
Fix:
(1) GPO: Computer Configuration\Administrative Templates\MSS (Legacy)\MSS: (KeepAliveTime) How often keep-alive packets are sent in milliseconds
(2) REG: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters!KeepAliveTime
Platform: |
Microsoft Windows 10 |