Proxies
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... it supports, and relative preferences for those transport protocols.
All proxies must implement both UDP and TCP, along with TLS ...
... proxy 2 would be a cluster of
homogeneously configured proxies. DNS needs to provide the ability
...
... element to maintain dynamic availability
state for the proxies it will communicate with. When a proxy gets
its first call with a particular domain ...
... proxy). Stateless
proxies are discussed in Section 4.4.
The procedures here are invoked when a client ...
... transaction state. This presents a challenge for stateless proxies,
which still need to meet the requirement for sending all requests in
...
... creates a new one. The problem
with stateless proxies is at a lower layer; it is retransmitted
requests within a transaction ...
... encoding. To make processing easier for stateless proxies, it is
RECOMMENDED that domain administrators ...
... implementors should be aware of this
limitation, and not use stateless proxies that access DNS if this
error is deemed critical ...
... alarm, and MAY reject the request.
An additional problem is that proxies, which are intermediaries
between the users of the system, are frequently the clients that
...