cFosSpeed是一款具有很多功能DSL modem和路由器驱动软件，可以充分使用你的ISDN和DSL连接。经过试用对ADSL拨号、路由器、PPPoE的FTTB提升速率都很有效。
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下载地址：

cFosSpeed 4.02 Build 1312 x86 原版：http://www.cfos.de/cfosspeed-v402.exe
cFosSpeed 4.02 Build 1312 x64 原版：http://www.cfos.de/cfosspeed-x64-v402.exe
cFosSpeed 4.00 Build 1283 x86 特别版：http://www.cniti.com/bbs/viewthread.php?tid=350851692&highlight=%2BEndlessRainX

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更新日志：

! Added rx-priorisation. It works as follows:

Each class (high, default, low, lowest) has a weight assigned. Furthermore,all TCP streams are mapped to a certain class (this only applies for bulk data; e.g. ACKs are always sent out in the higher class), according to filter rules. The class weight is used when TCP windows for rx-shaping are computed. A TCP stream with weight 100 gets a window that is about 4 times bigger than a stream with weight 25. This should *usually* translate into more speed on that stream, but not necessarily (e.g. the sending server might not be fast enough).
 The pre-set weights are:
 class high    -weight 400
 class default -weight 100
 class low     -weight 25
 class lowest  -weight 6

I.e. regular browser downloads (class default) should get about 16 times the speed than Torrents (class lowest).

The weighting needs some time (some seconds) to be through, so a newly created higher-than-average TCP stream needs these seconds to come to full speed.

+ Now UDP checksums are checked as well.

+ New language: Russian. That makes a total of 17 languages supported.

+ Added "spd timerstyle" command to query (just "spd timerstyle"), set "spd timerstyle " or list supported values ("spd timerstyle -?").Changes to timerstyle are only active after a restart of cFosSpeed.

+ Added layer-7 protocols SSL_S_BULK, SSL_C_BULK and SSH_BULK. Switching of sessions between bulk and regular mode is done automatically based on speed and packet sizes. Thanks to ghorvath for inspiration.

+ Added gset variable fwlog. Setting it to 0 ("spd gset fwlog 0 -save") will disable fwlog.txt logging of firewalled packets. Thanks to danny for inspiration.

+ Straightened evaluation of which filter rules determine the class of a connection. Now rules like -tcp-dport, etc. work as well. The third column of a "spd filter" output is 'c' for rules that set the class.

+ "spd reset_budget" without specifying a budget number now resets the current budget.

x Fixed warning that is displayed if too many connections cause rx-shaping to be inefficient. It was displayed regardless of the number of connections.

x Fixed a problem where downloads would be slowed too much. Thanks to FR.

x FTPS (FTP with SSL, FTP with TLS) command sessions are now identified as FTPCMD in layer-7 detection. Thanks to ghorvath.

x Switching the medium no longer changes the shaping algorithm. This was unintuitiv. If you want a different shaping algo (variable/fixed) you now have to switch it manually.

- Streamlined some code in search of obnoxious "slow LAN copy" bug. Thanks to Steve Coolen for his help.

- Module "ackfilter" is now disabled by default. Set "ackfilter=1" in section [param] in cfosspeed.ini to enable it again. This does only switch off the filtering of presumably superfluous TCP ACKs, not the regular priorisation of TCP ACKs.

- cFosSpeed service is no longer flagged interactive. Please inform us if something doesn't work as expected.