Aren't these harmful?

[The Incredible]

Hi guys, i got some registry tweaks from a site (Sorry don't remember da name ) But i wanna know that are these tweaks really useful.
Wudn't it will harm me system. I'm using Win98se n these r win9x tweaks.
Her r da tweaks.

Registry Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\VxD\MSTCP
Value Name: DefaultRcvWindow
Value Type: String Value
Value Data: 64240
Details: has to be a multiple of MSS for best results, i.e. (MaxMTU-40) x number... Best settings to try with MSS=1460 are 64240, 46720 and 23360, in that order




Registry Key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Servic es\Class\NetTrans\000n
(Where "000n" is your TCP / IP protocol. It contains "TCP / IP" assigned to the "DriverDesc" Value)

Value Name: MaxMTU
Value Type: String Value
Value Data: 1500
Details: If you're using DSL and your ISP has implemented PPPoE, you should set MaxMTU to 1492 or less.



Registry Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\VxD\MSTCP
Value Name: DefaultTTL
Value Type: String Value
Value Data: 64
Details: range 1-255, use any number between 32 and 128



Registry Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\VxD\MSTCP
Value Name: PMTUDiscovery
Value Type: String Value
Value Data: 1
Details: Boolean vlue, 0-false or 1-true. Many connections perform better with this entry at 1, however, if you prefer to set your upstream to send fixed 1500 packets, you might want to use 0 instead. When set at 1, establishing connections and initial transfer speed might slow down a bit, however you will get better throughput if somewhere in the path large packets need to be fragmented.


Registry Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\VxD\MSTCP
Value Name: PMTUBlackHoleDetect
Value Type: String Value
Value Data: 0
Details: zero for optimal performance


Registry Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\VxD\MSTCP
Value Name: Tcp1323Opts
Value Type: String Value
Value Data: 1
Details: The possible settings are 0 - No Windowscaling and Timestamp Options, 1 - Window scaling but no Timestamp options, 3 - Window scaling and Time stamp options. The value is documented in RFC 1323. According to Microsoft, Tcp1323Opts should be a DWORD, rather than a string value, however seems that the documentation is incorrect and a string value is necessary to enable large RWIN suppert.


Registry Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\VxD\MSTCP
Value Name: SackOpts
Value Type: String Value
Value Data: 1
Details: Possible settings are 0 - No Sack options or 1 - Sack Option enabled. Selective Acknowledgements are documented in RFC 2018


Registry Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\VXD\MSTCP\Parameters
Value Name: MaxDupAcks
Value Type: DWORD Value
Value Data: 2
Details: taking integer values from 2 to N

Plz help.

[banned2wise]

Man these tweaks are for TCP. If u arent very good with the registry, dont risk it. If u know some basics do it, or goto www.winguides.com and download the registry guide Iam not sure about the version.

[Delpiero]

IT's pretty safe to use these. I have a software called MAX MTU which can change all these settings. But they are not quite useful IMO i have tried them.

[The Incredible]

Well cant any 1 tell me that which 1 one of these is useful or which one of these is harmful.

Isnt there any encyclopedia on da net for tweaking registry with explained whatever is 1 gonna do in da tweak.

I wud beg digit 2 make their Fast Track July issue's topic as registry tweaks.

That wud b really gr8888.

Hop they will do it.