> In writing a tutorial on the role of routers in firewalls (planned for
> publication in the August issue of CiscoWorld), I realized that I can't
> think of a term for something many installations have. The firewalls
> list seemed the logical place to see if I've forgotten the term, or to
> invent an appropriate one.
> Consider a firewall system with an internal screening router, bastion
> host, and external screening router. Public hosts typically go onto
> a DMZ, which is between the external router and the bastion host.
> What I don't have a name for is a network between the bastion host
> and the internal router, which might be the home of authenticated
> terminal servers and other protected resources. Initially, I called
> it an "internal security backbone," but that sounds too much like
> something run by the Gestapo. :-)
I call it a 'perimeter' network.
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