On Jan 14, 2010, at 5:47 AM, Andrew Swartzbaugh wrote:

> My resolver only does lookups for the first two domains specified by the 
> search directive in the /etc/resolv.conf file.  For example, if I do a lookup 
> of server1.eur.domain2.mil and domain2.mil is the second domain specified by 
> the search directive, the query works.  However, if domain2.mil is the third 
> domain specified by the search directive, the query fails.
> 
> This is behavior that has changed within the last two weeks on our Solaris
> 9 systems (the Solaris 10 systems still work).
> 
> The only explanation that I can think of is that the resolver libraries
> have changed and that the libraries were only compiled to look through the 
> first 2 domains that are specified by the search directive.  Is this a 
> possibility?  Where are the dns resolver libraries located on a Solaris 9 
> system?

nslookup is not a valid test of the behavior of the stub resolver. Can you 
demonstrate the problem with a method that actually sends a request to the stub 
resolver, such as 'ping server1'?

Chris Buxton

> srs-e1-swartzb(~)->uname -a
> SunOS srs-e1 5.9 Generic_122300-39 sun4u sparc SUNW,Sun-Fire-480R
> 
> srs-e1-swartzb(~)-> more /etc/resolv.conf
> search eur.dcn.domain1.mil eur.domain2.mil conus.dcn.domain1.mil 
> nameserver 10.99.5.18
> nameserver 10.99.5.25
> 
> srs-e1-swartzb(~)-> nslookup
> Default Server:  dns-e1.eur.dcn.domain1.mil
> Address:  10.99.5.18
> 
>> set d2
> 
> 
> QUERY #1 - successful!
> 
> 
>> server1
> Server:  dns-e1.eur.dcn.domain1.mil
> Address:  10.99.5.18
> 
> ;; res_nmkquery(QUERY, server1.eur.dcn.domain1.mil, IN, A)
> ------------
> SendRequest(), len 39
>    HEADER:
>       opcode = QUERY, id = 36724, rcode = NOERROR
>       header flags:  query, want recursion
>       questions = 1,  answers = 0,  authority records = 0,  additional = 0
> 
>    QUESTIONS:
>       server1.eur.dcn.domain1.mil, type = A, class = IN
> 
> ------------
> ------------
> Got answer (87 bytes):
>    HEADER:
>       opcode = QUERY, id = 36724, rcode = NXDOMAIN
>       header flags:  response, auth. answer, want recursion
>       questions = 1,  answers = 0,  authority records = 1,  additional = 0
> 
>    QUESTIONS:
>       server1.eur.dcn.domain1.mil, type = A, class = IN
>    AUTHORITY RECORDS:
>    ->  eur.dcn.domain1.mil
>       type = SOA, class = IN, dlen = 36
>       ttl = 86400 (1D)
>       origin = dns-e1.eur.dcn.domain1.mil
>       mail addr = root.dns-e1.eur.dcn.domain1.mil
>       serial = 2010010803
>       refresh = 86400 (1D)
>       retry   = 7200 (2H)
>       expire  = 1728000 (1728000)
>       minimum ttl = 86400 (1D)
> 
> ------------
> ;; res_nmkquery(QUERY, server1.eur.domain2.mil, IN, A)
> ------------
> SendRequest(), len 35
>    HEADER:
>       opcode = QUERY, id = 36725, rcode = NOERROR
>       header flags:  query, want recursion
>       questions = 1,  answers = 0,  authority records = 0,  additional = 0
> 
>    QUESTIONS:
>       server1.eur.domain2.mil, type = A, class = IN
> 
> ------------
> ------------
> Got answer (138 bytes):
>    HEADER:
>       opcode = QUERY, id = 36725, rcode = NOERROR
>       header flags:  response, auth. answer, want recursion
>       questions = 1,  answers = 1,  authority records = 2,  additional = 2
> 
>    QUESTIONS:
>       server1.eur.domain2.mil, type = A, class = IN
>    ANSWERS:
>    ->  server1.eur.domain2.mil
>       type = A, class = IN, dlen = 4
>       internet address = 199.10.205.100
>       ttl = 86400 (1D)
>    AUTHORITY RECORDS:
>    ->  eur.domain2.mil
>       type = NS, class = IN, dlen = 22
>       nameserver = dns-e2.eur.dcn.domain1.mil
>       ttl = 86400 (1D)
>    ->  eur.domain2.mil
>       type = NS, class = IN, dlen = 9
>       nameserver = dns-e1.eur.dcn.domain1.mil
>       ttl = 86400 (1D)
>    ADDITIONAL RECORDS:
>    ->  dns-e1.eur.dcn.domain1.mil
>       type = A, class = IN, dlen = 4
>       internet address = 10.99.5.18
>       ttl = 86400 (1D)
>    ->  dns-e2.eur.dcn.domain1.mil
>       type = A, class = IN, dlen = 4
>       internet address = 10.99.5.25
>       ttl = 86400 (1D)
> 
> ------------
> Name:    server1.eur.domain2.mil
> Address:  199.10.205.100
> 
>> exit
> 
> 
> 
> 
> 
> srs-e1-swartzb(~)-> more /etc/resolv.conf
> search eur.dcn.domain1.mil conus.dcn.domain1.mil eur.domain2.mil
> nameserver 10.99.5.18
> nameserver 10.99.5.25
> 
> srs-e1-swartzb(~)-> nslookup
> Default Server:  dns-e1.eur.dcn.domain1.mil
> Address:  10.99.5.18
> 
>> set d2
> 
> 
> QUERY #2 - NOT successful!
> 
> 
>> server1
> Server:  dns-e1.eur.dcn.domain1.mil
> Address:  10.99.5.18
> 
> ;; res_nmkquery(QUERY, server1.eur.dcn.domain1.mil, IN, A)
> ------------
> SendRequest(), len 39
>    HEADER:
>       opcode = QUERY, id = 9424, rcode = NOERROR
>       header flags:  query, want recursion
>       questions = 1,  answers = 0,  authority records = 0,  additional = 0
> 
>    QUESTIONS:
>       server1.eur.dcn.domain1.mil, type = A, class = IN
> 
> ------------
> ------------
> Got answer (87 bytes):
>    HEADER:
>       opcode = QUERY, id = 9424, rcode = NXDOMAIN
>       header flags:  response, auth. answer, want recursion
>       questions = 1,  answers = 0,  authority records = 1,  additional = 0
> 
>    QUESTIONS:
>       server1.eur.dcn.domain1.mil, type = A, class = IN
>    AUTHORITY RECORDS:
>    ->  eur.dcn.domain1.mil
>       type = SOA, class = IN, dlen = 36
>       ttl = 86400 (1D)
>       origin = dns-e1.eur.dcn.domain1.mil
>       mail addr = root.dns-e1.eur.dcn.domain1.mil
>       serial = 2010010803
>       refresh = 86400 (1D)
>       retry   = 7200 (2H)
>       expire  = 1728000 (1728000)
>       minimum ttl = 86400 (1D)
> 
> ------------
> ;; res_nmkquery(QUERY, server1.conus.dcn.domain1.mil, IN, A)
> ------------
> SendRequest(), len 41
>    HEADER:
>       opcode = QUERY, id = 9425, rcode = NOERROR
>       header flags:  query, want recursion
>       questions = 1,  answers = 0,  authority records = 0,  additional = 0
> 
>    QUESTIONS:
>       server1.conus.dcn.domain1.mil, type = A, class = IN
> 
> ------------
> ------------
> Got answer (41 bytes):
>    HEADER:
>       opcode = QUERY, id = 9425, rcode = SERVFAIL
>       header flags:  response, want recursion
>       questions = 1,  answers = 0,  authority records = 0,  additional = 0
> 
>    QUESTIONS:
>       server1.conus.dcn.domain1.mil, type = A, class = IN
> 
> ------------
> ;; res_nmkquery(QUERY, server1, IN, A)
> ------------
> SendRequest(), len 22
>    HEADER:
>       opcode = QUERY, id = 9426, rcode = NOERROR
>       header flags:  query, want recursion
>       questions = 1,  answers = 0,  authority records = 0,  additional = 0
> 
>    QUESTIONS:
>       server1, type = A, class = IN
> 
> ------------
> ------------
> Got answer (22 bytes):
>    HEADER:
>       opcode = QUERY, id = 9426, rcode = REFUSED
>       header flags:  response, want recursion
>       questions = 1,  answers = 0,  authority records = 0,  additional = 0
> 
>    QUESTIONS:
>       server1, type = A, class = IN
> 
> ------------
> *** dns-e1.eur.dcn.domain1.mil can't find server1: Query refused
>> exit
> 
> 
> 
> 
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