hmm, it doesn't seem to be telling me anything I didn't really know already, and AFAIK, Windows Vista, and newer, automatically adjusts TCP settings:
WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client-to-server [C2S]) . . . . . 490.0kb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 9.47Mb/s
------ Client System Details ------
OS data: Name = Windows 7, Architecture = x86, Version = 6.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.6.0_15
------ Web100 Detailed Analysis ------
Cable modem/DSL/T1 link found.
Link set to Full Duplex mode
Information: throughput is limited by other network traffic.
Good network cable(s) found
Normal duplex operation found.
Web100 reports the Round trip time = 164.55 msec; the Packet size = 1460 Bytes; and
There were 117 packets retransmitted, 521 duplicate acks received, and 410 SACK blocks received
The connection was idle 0 seconds (0%) of the time
S2C throughput test: Packet queuing detected: 2.56%
This connection is receiver limited 4.05% of the time.
This connection is network limited 95.55% of the time.
Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: ON; Scaling Factors - Server=8, Client=10
Packet size is preserved End-to-End
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address
The one from the second link keeps showing an error saying the path is too long, so I guess London is slightly too far away. (About 50 miles, as the crow flies, to where Google says 'London' is)
EDIT:
Adjusted some settings in Windows, inbount test score went up to 9.81Mb/s, about 100 fewer packets retransmitted, packet queueing went down, receiver limited down to 1.6%, 'sender limited' 2.3%, time stamping on, and now it has added this on to the bottom:
Server 'ndt.iupui.lhr01.measurement-lab.org' is not behind a firewall. [Connection to the ephemeral port was successful]
Client is probably behind a firewall. [Connection to the ephemeral port failed]
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address