tool
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... To help finding problems in DNS configurations and/or implementations
there is a set of tools developed specifically for this purpose.
There is probably a lot of people in charge of domain administration
...
... There is probably a lot of people in charge of domain administration
having no idea of these tools (and, worse, not aware of the anomalies
that may exist in their configurations). What follows is a
description of some of these programs, their scope, motivations and
...
... Some prior knowledge from the reader is assumed, both on DNS basics
and some other tools (e.g., dig and nslookup), which are not analyzed
in detail here; hopefully they are well-known enough from daily
...
...
Host is an excellent tool, if used carefully. Like most other
querying programs it may generate lots of traffic, just by issuing a
...
... Domain Obscenity Control), an automated domain testing
tool that uses dig to query the appropriate name servers about
authority ...
...
DDT (Domain Debug Tools) is a package of programs to scan DNS
information for error detection, developed originally by Jorge Frazao
...
...
These tools work on cached DNS data, i.e., data stored locally after
performing zone transfers (presently done by a slightly modified
...
... Internet access, as was the case in Portugal by the time DDT was in
its first stages, this may be the only practical way to use the
tools.
...
... not entirely true that there aren't additional queries while
processing the information, one of the tools, the authority checker,
queries ...
... to aliases, and some more. Given the specialized nature of each
tool, it is possible to look for a well defined set of errors,
instead of having the data analyzed in all possible ways.
...
...
All the tools described above are the result of systematic work on
the issue of DNS debugging, some of them included in research
...
... The reference taken was the contrib directory in the latest BIND
distribution (where some of the above programs can also be found).
There you will find tools for creating your DNS configuration files
and NIS ...
... SCCS or RCS to maintain your configuration files consistent through
updates, or use tools like M4 macros to generate those files. As
stated above, it's important to avoid human-generated errors,
...
... requirements and it may be
difficult just to choose one of them to work with. For one thing,
people's expectations from these tools vary according to their kind
of involvement with DNS. If you are responsible for a big domain ...
...
Whatever your interest may be, you can almost surely find a tool to
suit it. Eliminating problems like those described in this document
is a major contribution for the efficiency of an important piece of
...
... Frazao, J. and J. L. Martins, "Ddt - Domain Debug Tools, A Package to Debug the DNS Tree", Dept. Informatica Faculdade Ciencias Univ. Lisboa, DI-FCUL-1992-04, January 1992. ...