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@@ -1,6 +1,6 @@
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.TH NDB 8
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.SH NAME
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-query, ipquery, mkhash, mkdb, mkhosts, cs, csquery, dns, dnsquery, dnsdebug \- network database
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+query, ipquery, mkhash, mkdb, mkhosts, cs, csquery, dns, dnstcp, dnsquery, dnsdebug \- network database
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.SH SYNOPSIS
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.B ndb/query
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[
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@@ -75,6 +75,19 @@ query, ipquery, mkhash, mkdb, mkhosts, cs, csquery, dns, dnsquery, dnsdebug \- n
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.I program
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]
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.br
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+.B ndb/dnstcp
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+[
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+.B -rR
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+] [
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+.B -f
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+.I dbfile
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+] [
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+.B -x
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+.I netmtpt
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+] [
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+.I conn-dir
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+]
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+.br
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.B ndb/dnsquery
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.br
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.B ndb/dnsdebug
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@@ -584,6 +597,31 @@ pairs naming the internal DNS `root' servers.
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should contain a series of
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.B ip
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pairs naming the external DNS servers to consult.
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+.SS "Zone Transfers and TCP"
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+.I Dnstcp
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+is invoked,
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+usually from
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+.BR /rc/bin/service/tcp53 ,
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+to answer DNS queries with long answers via TCP,
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+notably to transfer a zone within the database
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+.I dbfile
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+(default
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+.BR /lib/ndb/local )
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+to its invoker on the network at
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+.I netmtpt
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+(default
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+.BR /net ).
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+Standard input will be read for DNS requests and the DNS answers
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+will appear on standard output.
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+Recursion is disabled by
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+.BR -R ;
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+acting as a pure resolver is enabled by
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+.BR -r .
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+If
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+.I conn-dir
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+is provided, it is assumed to be a directory within
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+.IB netmtpt /tcp
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+and is used to find the caller's address.
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.SS "DNS Queries and Debugging"
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.I Ndb/dnsquery
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can be used to query
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@@ -670,6 +708,8 @@ in
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sys=helix dom=helix.research.bell-labs.com bootf=/mips/9powerboot
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ip=135.104.117.31 ether=080069020427
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.EE
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+.br
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+.ne 8
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.LP
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Look up
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.B plan9.bell-labs.com
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David du Colombier