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Full Discussion: nslookup strangness
Special Forums IP Networking nslookup strangness Post 302145249 by purest on Tuesday 13th of November 2007 12:36:48 PM
Old 11-13-2007
nslookup strangness

hi,
what would cause the nslookup to work one way but not the other?

for most machine it works both ways.
Code:
>nslookup 172.18.10.235
Server:         172.16.17.3
Address:        172.16.17.3#53

235.10.18.172.in-addr.arpa      name = machine1.prod.local

>nslookup machine1
Server:         172.16.17.3
Address:        172.16.17.3#53

Name:   machine1.prod.local
Address: 172.18.10.235


but for one of the machines it only works on one direction!?!:
Code:
>nslookup machine2
Server:         172.16.17.3
Address:        172.16.17.3#53

Name:   machine2.prod.local
Address: 172.18.94.89

>nslookup 172.18.94.89
Server:         172.16.17.3
Address:        172.16.17.3#53

Non-authoritative answer:
*** Can't find 89.94.18.172.in-addr.arpa.: No answer

Authoritative answers can be found from:
.       nameserver = I.ROOT-SERVERS.NET.
.       nameserver = J.ROOT-SERVERS.NET.
.       nameserver = K.ROOT-SERVERS.NET.
.       nameserver = L.ROOT-SERVERS.NET.
.       nameserver = M.ROOT-SERVERS.NET.
.       nameserver = A.ROOT-SERVERS.NET.
.       nameserver = B.ROOT-SERVERS.NET.
.       nameserver = C.ROOT-SERVERS.NET.
.       nameserver = D.ROOT-SERVERS.NET.
.       nameserver = E.ROOT-SERVERS.NET.
.       nameserver = F.ROOT-SERVERS.NET.
.       nameserver = G.ROOT-SERVERS.NET.
.       nameserver = H.ROOT-SERVERS.NET.

any idea?
 

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NRPORTS(5)						     Linux Programmer's Manual							NRPORTS(5)

NAME
nrports - NET/ROM port configuration file. DESCRIPTION
Nrports is an ASCII file that contains information about each of the NET/ROM ports that are to be used. When dealing with an NET/ROM util- ity such as call, it takes an optional argument that is the port name. This port name is a reference to the line within nrports, which has the same name. The information on each line contains enough information to bind the command to a particular NET/ROM interface, this binding is done by matching the callsign on the line in nrports with the callsign of the port set by ifconfig. The nrports file may contain comments that begin with a # in the first column, or a port description in the following format, each field being delimited by white space: name callsign alias paclen description The field descriptions are: name this is the unique NET/ROM port identifier. callsign the callsign of the NET/ROM interface to bind to. alias this is the alias of the NET/ROM port. paclen is the default packet size for this interface. description a free format description of this interface, this field extends to the end of the line. It may contain spaces. FILES
/etc/ax25/nrports SEE ALSO
call(1), netrom(4), ifconfig(8), nrparms(8). Linux 2 August 1996 NRPORTS(5)
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