Re: Squid issues using Satellite system

Hi,

May I ask what satellite service you are using?

Adi

On Fri, 16 Jun 2000, bart bunting wrote:

> Ben Capili writes:
> > I don't know if this is more a question on routing or on Squid but I'm at a
> > loss for a solution, so I hope someone out there can help me.
> >
> > I'm using Squid 2.2 STABLE4 on a RH 6.1 box. We are trying to deploy an
> > ISP-type system using an internet connection over satellite. The limitation
> > with accessing the Internet over satellite is that it is uni-directional
> > (downstream) from the satellite so therefore, HTTP requests have to be sent
> > back up via a conventional dial-up modem.
> >
> > Here's the situation:
> >
> > A client dials out through their local ISP in order to access the Squid
> > proxy. (The proxy, of course, has a static IP) The Squid box needs a
> > default gateway in order to access the internet (let's say via a T1 line) to
> > retrieve the data that was requested by the client. Now, in order to
> > forward this data to the "satellite side", the Squid proxy has to be routed
> > to a special gateway that can send this data over to the "satellite side" &
> > not back through the conventional internet path, otherwise it would just be
> > relayed back to the client via the modem (which would be much slower).
> >
> > So here's my question. Is there anything I can put in the squid.conf file
> > to direct the internet data it has retrieved to a particular gateway/server?
> > I know you can direct it to another proxy but what about just another
> > gateway? I thought I could do it via the routing table but how would you be
> > able to route all traffic to a particular server and also have a default
> > gateway to access the internet to retrieve data from HTTP requests? By
> > having a default gateway to access the internet, all traffic flows out
> > through this gateway & not to the gateway I want it to. At least this is
> > how I understand it. I hope someone with more routing expertise can help me
> > understand this.
>
> I've never done this before, but i've been reading some docs on
> satellite connections, with a view to doing a similar thing. It
> appears that what should happen is that the default route on the
> internet for your dialup client actually points to the satellite
> centre, and you use a ip tunnel on the dialup client to get packets
> out through the modem back to the rest of the internet.
>
> so, what happens, is that a request is generated on the client, it has
> the source ip of the satellite connection on the packets. it is then
> wrapped up in another ip packet (the tunneling bit) which travells out
> through your modem to the other end of the tunnel, probably at your
> isp or the satellite centre. Next the packet is decapsulated e.g. the
> extra headers that were put on for it to travel through the tunnel are
> removed. At this point the packet is out on the internet with the
> source ip of the satellite connection and the destination of where
> ever it was going. The packet travels to it's destination, and any
> packets sent in return travel to the satelite centre and via satellite
> to your client.
>
> this way, your proxy machine would only need to set it's default route.
>
>
>
> hope this makes sense, and if anyone can see a problem with this
> explanation, please let me know why it won't work as i'm about to try
> it myself once the satellite connection is installed.
>
> HTH
> Bart
>
> >
> > Please Help!! Thank you in advance.
> >
> > Sincerely,
> >
>
Received on Thu Jun 15 2000 - 18:45:51 MDT