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- NAME
- doc - diagnose unhealthy DNS domains
-
- SYNOPSIS
- doc [-p] [-e][-w][-v][-d] domain_name [parent_domain_name]
-
- DESCRIPTION
- Doc is an automated tool for verifying (to an extent) that a
- domain is configured and functioning correctly. It makes no
- attempt to validate the data inside a domain, only the
- structure. The only required parameter is the valid domain
- name of an existing domain. Example:
-
- doc isi.edu.
-
- Previous versions of doc required that you specify the
- parent (delegating) domain if it was not precisely one level
- up from the domain being checked (or specify the parent
- nameservers in an appropriately named file). Although the
- option still exists to do that (and it may be required with
- some complex configurations), some heuristics have been
- added that make some attempt to handle parent domains that
- are more than one level up from the current domain. Exam-
- ples:
-
- doc isi.edu. edu. (correct, but not required)
- doc isi.edu. (this works too)
- doc 9.128.in-addr.arpa. arpa. (correct, but not required)
- doc 9.128.in-addr.arpa. (this works too)
-
- If you have problems, giving the parent information informa-
- tion explicitly may help.
-
-
- OPTIONS
- -p Skip testing the information held at delegating
- domain's servers.
-
- The default operation of doc includes testing that all
- of the servers for the delegating (parent) domain agree
- about the delegation information held for the domain in
- question. Since inconsistencies discovered at this
- level may or may not indicate serious problems, one can
- choose to skip the parent testing. If so, doc uses the
- first non-authoritative list of NS records from a
- parent domain server as those to direct further
- queries. If all of the parent domain servers are addi-
- tionally authoritative for the domain, the answer from
- the last one queried is used. This may be a useful
- timesaver if you are regularly checking up on a large
- number of domains. [See also section FILES USED for a
- similar functionality.]
-
- -[e][w][v][d] Specify the level of verbosity to standard output.
-
- The default mode of operation is to only print to stan-
- dard output a summary of what is discovered. In addi-
- tion, errors made in the process of testing (i.e. query
- errors, errors causing doc to abort, etc) are noted.
-
- -e Output comments about errors discovered.
- -w Output comments about warnings issued.
- -v Verbose output. Include misc. comments and output
- confirming correct behavior.
- -d Debug output. Checkpoint current (last)
- nameserver query.
-
- These output options are cumulative (i.e. -v implies -v
- -w -e).
-
- NOTE: Parsing is very simple. All option flags must
- come before the domain names.
-
- FILES CREATED
- In addition to the standard output, doc produces a log file
- named log.<domain_name>, which it places in the current
- directory. This file includes all "verbose" level comments,
- followed by the nameserver responses to the queries (in a
- slightly masticated form).
-
- While running, doc creates several temporary files in the
- current directory. These files have names of the form:
-
- <domain_name>.*
-
- FILES USED
- Doc expects the auxiliary files: doc1.awk, doc3.awk, and
- doc4.awk to reside in the current working directory. This
- can be overridden by changing the program to look for them
- in a directory indicated in a shell variable intended for
- this purpose. If your System Administrator installed doc,
- they'll need to make the necessary modification.
-
- Doc looks for the file DNsrv.<parent_domain_name> in the
- working directory. If it exists, doc does not make a stan-
- dard query to discover the list of nameservers for the
- parent domain. Rather it queries the list of servers con-
- tained in this file to obtain delegation information for the
- domain being tested. This may be useful if one regularly
- tests a series of domains, all with the same delegating
- zone, where one of the servers in known to be foul. This
- server would simply be omitted from the the DNsrv.* file.
-
- awk, sed & dig (version 2.0 or higher) are expected to be
- found in your normal path. If not, you may want to alias to
- the full path inside of doc itself.
-
- DETAILS
- See file INFO (included with distribution tar) for details
- of procedure.
-
-
- BUGS
- The exit code returned via the shell is only 8 bits. This
- could cause a problem in the value returned by the auxiliary
- file doc3.awk. This hasn't been seen yet (a "poison confi-
- guration" is not likely to occur yet), and hopefully will be
- corrected if/when doc is re-implemented (see below).
-
- The current implementation is fairly simple (albeit not
- pretty), so it is not expected to abort unexpectedly. How-
- ever, this version (2.0) is an initial attempt at automating
- this task. Further development is expected in identifying
- the appropriate queries, analysis, and subsequent conclu-
- sions that are made. Hopefully once the design of the test
- suite has become more stable, a less "patchwork" production
- version of doc will be done.
-
- COMMENTS
- The previous authors effectively stopped further development
- and support in 1990. Starting with version 2.1, the offi-
- cial anonymous FTP site for doc is ftp.vix.com as part of
- the the latest distribution of BIND (see the BIND Home Page
- at <URL:http://www.isc.org/isc/>). It will likely also be
- made available in the DNS Resource Directory
- <URL:http://www.is.co.za/andras/computer/dnsrd/> in the near
- future.
-
- Relatively minor modifications have been made with version
- 2.1, mostly to make the program a bit more robust in han-
- dling parent (delegating) domains for the use of Defense
- Information Systems Agency personnel.
-
- This program is being shared with the rest of the Internet
- on a unsupported basis. If you have any enhancements or
- changes you have made, please let us know. We'd love to see
- them, with an eye towards integrating them into our version
- (and also into the publicly available version). However,
- keep in mind that I'm not getting paid (nor do I have the
- time) to support the whole Internet on this tool.
-
- With the previous authors no longer providing support for
- doc, it becomes far less likely that a "less 'patchwork'
- production version" will ever become available.
-
- INFO
- The name doc comes from Domain Obscenity Control, in that
- the kinds of problems it looks for are considered "obscene"
- from the perspective of a well-managed DNS.
-
- TO DO
- RFC 1537 SOA value conformance checking (warnings only).
-
- PREVIOUS AUTHORS
- Steve Hotz (hotz@isi.edu) Paul Mockapetris (pvm@isi.edu)
-
- MODIFICATIONS BY
- Brad Knowles (brad@birch.ims.disa.mil)
-
- SEE ALSO
- dig(1), bind operators guide (BOG), RFCs: 1034,1035,1535-
- 1537,1713,xxxx
-