cFosSpeed is a network driver, which attaches itself to existing Internet connections. It then optimizes data transfer by means of Traffic Shaping.

Traffic Shaping is a method for optimizing the Internet traffic. It allows maximum speed while ensuring minimal Ping.

You can use cFosSpeed with a router and/or a DSL-modem or cable-modem. You can also use cFosSpeed with other types of Internet access, ie. whenever you already have an existing Internet connection.

for existing connections
>> Traffic Shaping
>> broadband (DSL, Cable)
>> router and dial-up connections
>> modem or mobile (e.g. UMTS)
>> Windows 2000, XP, Server 2003, Vista


cFosSpeedsupports a wide variety of connections, like DSL, cable, ISDN, UMTS, etc.

cFosSpeed has two goals:
1. Keep network delays (ping times) small, in order to make Internet applications as responsive as possible.
2. Improve data throughput by avoiding network congestions.

Traffic Shaping best for

* Broadband: DSL, Cable
* Narrow band: modem, ISDN
* Mobile
* Filesharing (P2P)
* Games
* Streaming Media, VoIP

Features

* Low Ping
* Prioritising programs
* Prioritising protocols
* Online Budgets
* Firewall

System requirements:

* Windows XP / Windows Vista, but also Windows 2000
* 32bit / 64bit (x64)
* existing Internet connection

cFosSpeed 4.22 build 1406 -- 25-Jun-2008

+ Filter expressions -s and -d now accept lists of addresses. Thanks to
reMiND for the idea.

+ Added a switch to log all TCP connections with their adresses, ports,
statistics, etc. to a disk file. This may be good if you want to see
what happened, when you didn't watch the status window. The data of the
sessions is not saved, only statistics.

To activate set "spd gset log_sessions 1". Add a "-save" if you want to
keep it activated after a restart. The disk file is called
session_log.txt; you can set it max size with gset variable
max_session_log_size, default is 1mb.

+ Added spd command "tcb" to show interactively some of the info that is
written to session_log.txt.

+ cFosSpeed now uses less allocations and thus less CPU load.

x Fixed psched.sys crash. Thanks to Reinhold Gose for dump file.

x IP reassembly code was broken. Fixed.

x Fixed a cfosspeed.exe crash. Thanks to Steffen Rose for report.

x Low latency mode lowered the TCP MSS even in cases where the increased
amount of TCP ACKs would totally saturate the upstream. We now only
lower the MSS if the RX and TX rates are reasonably symmetrical. Thanks
to Oliver Rauh for bug report.

x To fix the case where line geometry is such that you have lots of download
and not much upload (like 1024/32) we now limit the amount of data that
is sent out prioritised in classes high and higher to 40% of TX-bandwidth
each. If that limit is exceeded, packets are sent out like any other
packet is with default priority.

Home page Beta page

4.33 MB (Both 32 and 64 bit version):

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