Re: [Openvpn-users] OpenVPN utilized as a traffic compression mechanism

[Jon Bendtsen <jon.bendtsen@xxxxxxxxxx>]

Den 2. dec 2005 kl. 12:22 skrev Andrew Alston:

> Hi Guys,
>
> This is a rather strange one.  I have the following scenario I'm  
> considering, and Im curious to know if anyone else has tried  
> something like this, or could give me some kind of indication as to  
> thoughts on the idea, as well as hardware specifications I would  
> need to actually do this.
>
> We have a 112mbit international line, that is currently virtually  
> saturated, the idea is to put 2 boxes on either side of that line,  
> both running openvpn.  We would then form a tunnel between them,  
> and turn on LZO compression, in effect providing us with  
> compression over our line.  The data carried over the line is  
> general internet access (the line belongs to an NREN in South  
> Africa, and is used to provide general internet to the entire  
> higher education sector in south africa).
>
> My questions are as follows,
>
> a.) What kinda hardware would I need to real time compress this  
> much traffic, considering the *VAST* number of tcp sessions being  
> formed between the universities and various places on the internet,  
> the high PPS rates we run on that line, the throughput etc.
> b.) Would I see a huge latency increase doing this
> c.) Any other general comments about a solution like this
>
> Anyone who can give me some advice, please let me know

If you control both ends, why not simply just use something that
compresses each and every packet, even the header as well.
Then either end just decompresses every packet and does something
with it. The overhead should be smaller than using openvpn.



JonB

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