On 7/16/07 10:43 AM, "Joel Jaeggli" <joelja(_at_)bogus(_dot_)com> wrote:
Widespread deployment of ALG's as mediators means you have to upgrade
the network to support new applications. or applications are built on
top of hostile tunnels over your alg infrastructure (sound familiar?).
While some enterprise networks seem to favor this, it's not really the
Internet.
At some point a lot of these things tend to look awfully
similar to one another (NATs look like tunnel endpoints look
like relays, etc.) but they tend to break out into broad
categories. So, you have some mechanisms that operate at
the network layer and some that operate at the session or
application layer. The lower in the stack they sit the
more general they can be, clearly, but then you tend to
encounter more problems around reachability and findability.
Melinda
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