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BT往往令人联想到盗版和非法,致使世界各地越来越多的ISP采取措施限制BT下载传输带宽,或者封锁BT软件使用的6881-6889端口,使得本来BT下载人数越多越高速的传输速度因而大为减慢。有鉴于此,新一代BT客户端软件纷纷增加一种称之为“加密传输”(Encrypted Transport)或“通讯协议加密”(Protocol Encryption)的功能,优点是能够避开ISP的BT下载速度限制,同时可使传输的资料不易被破解,减少被人追踪隐私的可能性。
近斯流行的BT客户端软件如BitComet、Azureusu、uTorrent、Mainline都纷纷增加了加密传输功能,其中BitComet、Azureusu、uTorrent的通讯协议加密演算方法还是相互兼容的。
以新版uTorrent及Azureus为例,其加密传输原理是通过每一个Torrent的不同Hash值,再加上Diffle-Hellman演算法RC4加密等级,使传输资料内容不易被追踪破解,从而保护资料,而且亦能突破ISP的带宽限制。
而加密传输技术的真正实用化,则是从知名BT客户端软件BitComet 0.60开始的。当时它使用的加密系统为PHE系统,此后Azureus 2.4软件又采用MSE加密系统,到后来uTorrent和Azureus都采用了PE/MSE加密系统。2006年3月,BitComet 0.63版推出,改成采用PE加密系统,自此与uTorrent和Azureus兼容。2006年4-5月左右,Ktorrent及Mainline也都开始支持PE/MSE加密系统。发展到现在,PE/MSE俨然已经成为BT加密传输的行业标准。
Azureus
1. Go to: Tools > Options > Connection > Transport Encryption
2. Check the ‘require encrypted transport’ box.
3. Choose RC4 in the ‘minimum encryption’ dropdown box
note that RC4 uses more CPU time than the plain encryption or no encryption. It is however harder to identify for traffic shaping devices
4. You can choose to tick the ‘Allow non-encrypted outgoing connections if encrypted connection attempt fails’ box. This will ensure compatibility with clients that are not using encryption. However, it makes it easier for your ISP to detect BitTorrent traffic. I recommend that you try to tick this box first. If you are still not getting proper speeds untick it
5. Tick the ‘Allow non-encrypted incoming connections’ box
Bitcomet
1. Go to: Options > Preferences > Advanced > Connection
2. Go to: ‘Protocol encryption’ You can choose between ‘auto detect’ and ‘always’. Auto detect will give you more connections but offers less protection against traffic shapers.
I would recommend to try auto detect first, if that doesn’t increase your speeds you need to switch to always
uTorrent
1. Go to: Options > Preferences > BitTorrent
2. Go to ‘Protocol encryption’, you can choose between ‘enabled’ and ‘forced’. ‘Enabled’ will give you more connections but offers less protection against traffic shapers.
I would recommend to try ‘enabled’ first, if that doesn’t increase your speeds you need to swich to ‘forced’.
3. Ticking ‘Allow legacy incoming connections’ allows non ecrypted clients to connect to you. This improves compatibility between clients but makes you more vulnerable to traffic shapers.
I would recommend to tick this box, but if that doesn’t increase your speeds, untick it!
Good luck Guys |
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