[unisog] risks of a mixed network
michael.holstein at csuohio.edu
Tue Oct 24 19:28:44 GMT 2006
Method 1 :
You own the building, right? .. deny the Telco the ability to
cross-connect .. or install filters to block the frequencies used for
DSL or Cable (they're cheap).
When I lived in a large residential building the owners actually
installed their own fiber/copper MUX (but no DSLAM) so people would call
SBC, pay for a phone line and DSL, only to have the installer for the
phone come first (and charge $40), then have the DSL people tell them
"no dice .. due to pair gain" since they couldn't cross-connect to a
DSLAM. They also owned all the cable.
Method 2 :
Get a cheap and fast (but somewhat unreliable) connection from somebody
like Cogent (they're quoting us like $10/mb/mo) .. install a firewall
between RESnet and everything else, and allow students to "buy" a fatter
unrestricted pipe that sends their default route out the other
connection (and don't oversubscribe it too bad).
You still get to control the general security policy that way.
Michael Holstein CISSP GCIA
Cleveland State University
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