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firewall
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... MIDCOM requires upgrades to existing NAT and
firewalls, in addition to application components. Complete upgrades
of these NAT and firewall ...
... firewalls, in addition to application components. Complete upgrades
of these NAT and firewall products will take a long time, potentially
years. This is due, in part, to the fact that the deployers of NAT
...
... years. This is due, in part, to the fact that the deployers of NAT
and firewalls are not the same people who are deploying and using
applications. As a result, the incentive to upgrade these devices
will be low in many cases. Consider, for example, an airport
...
... This is useful for determining whether the client is behind a
firewall, and for applications that have separated control and data
components. See Section 10.3 for more details. The CHANGE-REQUEST
attribute is also optional. Whether it is present depends on what
...
... UDP
o Firewall that allows UDP out, and responses have to come back to
the source of the request (like a symmetric NAT ...
... client knows that it has open access
to the Internet (or, at least, its behind a firewall that behaves
like a full-cone NAT, but without the translation). If no response
...
... is received, the client knows its behind a symmetric UDP firewall.
In the event that the IP address ...