DOS Protection valid ?

[skywalker]

Is this valid ?

Denial-of-Service Protection

CODE
[HKEY_LOCAL_MACHINE\SYSTEM\CURRENTCONTROLSET\SERVICES\TCPIP\PARAMETERS]
"SYNATTACKPROTECT"=DWORD:00000002
"TCPMAXDATARETRANSMISSIONS"=DWORD:00000003
"TCPMAXHALFOPEN"=DWORD:00000064
"TCPMAXHALFOPENRETRIED"=DWORD:00000050
"TCPMAXPORTSEXHAUSTED"=DWORD:00000001
"TCPMAXCONNECTRESPONERETRANSMISSIONS"=DWORD:00000002
"ENABLEDEADGWDETECT"=DWORD:00000000
"ENABLEPMTUDISCOVERY"=DWORD:00000000
"KEEPALIVETIME"=DWORD:00300000
"ALLOWUNQUALIFIEDQUERY"=DWORD:00000000
"DISABLEDYNAMICUPDATE"=DWORD:00000001

[Ghirai]

It helps.

[Mark Jones]

Interesting... what is the full details of this? Is it to prevent that PC from being a DOS bot? Are there any caveats?