Compressing/decompressing traffic & cache & unchanged ip

[Marcin Jessa]

Hi Oleksandr.

Maybe SCPS is something for you. It's originally designed for satellite links with latency problems.
I gathered some info about it. I suggest you to start reading http://www.yazzy.org/docs/SCPS/SCPS_GATEWAY_v1.2.1.doc
It was originally designed for FreeBSD and compiles cleanly on FreeBSD 6.x and 7.x (CURRENT) with a few simple patches I made, which I can provide.

Cheers,
Marcin.



On Fri, 2 Sep 2005 23:02:45 +0300
Oleksandr Samoylyk <oleksandr at samoylyk.sumy.ua> wrote:

> Hello World!
> 
> I've a "strange" idea. Here I've outlined the plan:
> 
> ========================================================
> 
> Compress traffic   Uncompress traffic   Compress traffic
>        here              & cache               here
>   ___________          _________          ___________
>   |          |         |        |         |          |
> --|  Router  |         |  Our   |         |  Router  |--
> --| in city1 |-------->| ROUTER |<--------| in city2 |--
>   |__________|         |________|         |__________|
>                           |
>                           |
>           ________________|________________
>           |       |       |       |       |
>                      Our clients
> 
> ========================================================
> 
> So, let me describe the situation. We have our central router and 
> several router in different places. Unfortunately, we haven't got a good 
> connection to them. Our physical "link" to them is quite "narrow". 
> Nevertheless, our "external" routers are good connected to the "world" 
> (they have megabit uplinks). We can't at the moment got a better 
> connection between them and our central router :(.
> The ultimate aim is to speed up bandwidth for our clients by means of 
> software :)
> We had been using a transparent cache-server (Squid) for some time, but 
> it has the problem (as all proxies have). It changes ips of clients.
> I'd a sort of brain-wave :) and thought out the following:
> - On those routers we compress traffic (how?)
> - On our main router we decompress it and cache it (how?)
> - Moreover, it should be done transparently and without substitution of ip for client. So client even don't "feel" that he/she is behind proxy or so...  So everywhere should be ip of user not Squid one. (how?)
> - In addition to that it would be good to do this with HTTP and FTP as well...
> 
> I've heard about Layer 7 switches that IMHO can do this things...
> I'd like to realize something like that on Unix.
> 
> I'll appreciate any help.
> 
> Thanks!
> 
> -- 
>   Oleksandr Samoylyk
>   OVS-RIPE
> 
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