Security of satellite links into an organisation

["Wigg, Guy G" <GWigg () mail sbic co za>]

Hi all

Bandwidth in South Africa is expensive and the response times are not at all
that great. We have decided that a good solution for surfing the net is via
satellite. One of the SA ISPs offer this service. This would be the basic
set-up, they supply a proxy (MS proxy) that they propose sits on the
organisation's backbone network. 

The http request exits the organisation via our landlines to a proxy at the
respective ISP. On exiting we obviously control the connection via the
firewall we have in place. The ISP then sends the return WebPages to the
organisation via the satellite dish. My question is what is the security
risk of this set-up? We now have an unprotected pipe coming into the
network. Agreed the hacker wouldn't get any responses since the dish can
only receive (the responses would blocked by the land FW infrastructure).
What risk would we be putting ourselves at?

Any feedback on this would be greatly appreciated.

thanks
Guy


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