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Joined: Sep 2005
Posts: 2,049
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Joined: Sep 2005
Posts: 2,049 |
Could what be a Communist Country ?
Let It Be , I live in a Yellow Submarine . SCCE
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Joined: Dec 2004
Posts: 4,096
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Joined: Dec 2004
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the country that will use the voip to here.
Again ayman be very careful about were you send voip to. Some countries do not allow it and you can be considered criminal in helping to set it up.
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Joined: Mar 2006
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OP
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Joined: Mar 2006
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so there is no way around it? i.e sending voip without any one detecting it?
ayman
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Joined: Jun 2005
Posts: 211
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Joined: Jun 2005
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The broader question is not specific to VOIP traffic, but to the security of the encryption used in the VPN.
Packet sniffers will detect the encrypted packets, but that alone will not reveal the nature of the traffic. In order to know what data is being transmitted, the encryption must first be broken.
Cryptologists do not speak in terms of what is possible and what is not possible. Rather, what is possible today, and what is not possible YET.
"Not Possible Yet" simply means it is either too expensive or too time-consuming to realistically break a given method of encryption. The Triple-DES algorithm used in today's VPN tunnels falls into this category.
Of course, all the encryption in the world means nothing in many countries, where the door will simply be smashed in if the authorities suspect something illegal. This is the real question. Will doing what you propose break laws and thereby put people's freedom and/or lives at risk? If so, go with another proposal.
-Steve
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Joined: Apr 2006
Posts: 6
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Let's use Costa Rica as an example. The telecom there is the government (ICE to be specific) and they do not permit VoIP traffic because it eats into a significant chunk of revenue.
Having said that. The vast majority of ISPs check for and classify traffic by port and protocol. For the most part, when it comes to VoIP they are looking for traffic on 5060 and for significant UDP/RTP streams. Using a VPN tunnel to encapsulate this traffic takes the two easiest to identify VoIP indicators away from the telecom. Can they still dive deeper and figure out if you are using VoIP? Sure. Will they? In almost every case the simple answer is no. Since the port/protocol method will find the vast majority of users and allow the ISP to shut them down or bill them this is the 90/10 rule. We can capture and bill 90% of violating users and the other 10% we won't worry about.
Wordy and a bit rambling, but I hope it helps.
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