The Mizu VoIP Tunnel was optimized for Microsoft Windows OS with a MS-SQL backend. All administration tasks can be done using the MManage (MizuManage) client application. The main module is automatically installed with the tunnel server installer, but you can also install it independently to any PC and manage your tunnel server remotely.
Mizu VoIP tunneling solution use 12 different transport method, using UDP, TCP or HTTP protocols to bypass all firewalls.
- - encrypted UDP: the SIP server will not listening on the standard 5060 port. (doesn't have any network overhead compared to normal voip (SIP/RTP) and has the same quality). This is usually enough in VoIP blocked countries
- - encrypted TCP tunneling: using the standard SSL port so it will bypass most of the firewalls (has even better quality, but it doesn't tolerate too much packet loss so good than UDP does)
- - encrypted HTTP tunneling: using the standard HTTP port so it will bypass all corporate proxy systems (has a 35% overhead and needs more server side resources, but it can bypass almost all HTTP proxy servers with streaming support)
Mizu tunnel server is running over a full featured class 4/5 SIP stack with the following functions: voice calls, video calls, presence, IM, DTMF methods, PBX functions like call hold, transfer, conference etc. and support the commonly used codecs: G729, PCMA, PCMU, G723, GSM, Speex, Speex WB, iLBC ect.
Our encryption methods are based on symmetric keys(to speed-up the connect times). The most used encryption method is Blowfish
(due to its low CPU usage).
For key exchanges usually the RSA protocol is used. RSA protocol is known as one of the first practicable
public-key cryptosystem and is yet widely used for secure data transmission.