After installing SP4, my internet access speed is near
zero EXCEPT when I access microsoft sites. I have a 3/4
broadband pipe and I'm getting 28K modem like speeds on
almost every web site.

A knowledge base posting describes this behavior with
Norton Systemworks 2001. I have 2002. Symantec tells me
that this is not a problem with thier software. I'm
inclined to believe them since I've disabled everything
and I'm still having this problem.

Anyone know of a fix?

Hello,

Incompatibility with specific TCP/IP Parameters

Resolution:

Please disable the following values (changed parameter to 0) and test:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Enable
PMTUDiscovery

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\TCP132
3Opts


EnablePMTUDiscovery
Key: Tcpip\Parameters
Value Type: REG_DWORD - Boolean
Valid Range: 0,1 (False, True)
Description: Setting this parameter to 1 (True) causes TCP to attempt to
discover
the Maximum Transmission Unit (MTU or largest packet size) over the path to
a
remote host. By discovering the Path MTU and limiting TCP segments to this
size,
TCP can eliminate fragmentation at routers along the path that connect
networks
with different MTUs. Fragmentation adversely affects TCP throughput and
network
congestion. Setting this parameter to 0 causes an MTU of 576 bytes to be
used for
all connections that are not to computers on the local subnet.

TCP1323Opts
Key: Tcpip\Parameters
Value Type: REG_DWORD - Boolean
Valid Range: 0,1,2,3
0 (disable RFC 1323 options)
1 (window scale enabled only)
2 (timestamps enabled only)
3 (both options enabled)
Description: This value controls scaling windows and timestamp per RFC 1323

Thank You.


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