If you are using Windows 95, first download and install the Winsock Update from Microsoft before proceeding to the steps below.
Navigate the the location below in your registry and
make the corresponding change.
Create the following DWORD values and set the value as shown below.
DefaultTTL = "128" (String Value)
This specifies the default time to live (TTL) for TCP/IP packets. The default is 32.
DefaultRcvWindow = "372300" (String Value)
This specifies the default receive window advertised by the TCP/IP stack. The default is 8192.
PMTUBlackHoleDetect = "0" (String Value)
This specifies whether the stack will attempt to detect Maximum Transmission Unit (MTU) routers that do not send back ICMP fragmentation-needed messages. The default is 0.
PMTUDiscovery = "1" (String Value)
This specifies whether the TCP/IP stack will attempt to perform path MTU discovery as specified in RFC 1191. The default is 1.
SackOpts = "1" (String Value)
Enables support for selective acknowledgements as documented by Request for Comment (RFC) 2018. Default is 0.
Tcp1323Opts = "3" (DWORD Value)
Controls RFC 1323 time stamps and window scaling options. Possible values are: "0" = disable RFC 1323 options, "1" = window scale enabled only, "2" = time stamps enabled only and "3" = both options enabled.
To increase performance even further follow the instructions here and increase the MaxMTU to 1500.
Restart Windows.
Key:[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP]
