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Full Discussion: nslookup/ping resolve problem 11i v3
Operating Systems HP-UX nslookup/ping resolve problem 11i v3 Post 302586868 by keelba on Tuesday 3rd of January 2012 02:54:50 PM
Old 01-03-2012
nslookup/ping resolve problem 11i v3
I am having a problem with a new server build that has got me completely baffled. This server has a private back end network so the way it is supposed to work is that the server thinks its ip address is 10.131.0.48 but the rest of the world knows it as 199.68.100.100 per DNS. It has to be this way for the application to install.

The problem is that nslookup from this server shows that it is using files correctly and resolves to the 10. address as it should. But when I try to ping by hostname from this same server it pings the 199. address. We have other HP-UX servers set up exactly this same way and they work as expected but they are running 11.23. This new server is 11.31. I am guessing that has something to do with it but I cannot figure out what.

root@sho1hsmbk001:/root> grep sho1hsmbk001 /etc/hosts
10.131.0.48 sho1hsmbk001.xxxxxxxxxxx.corp sho1hsmbk001 sho1hsmbk001-bk

root@sho1hsmbk001:/root> cat /etc/nsswitch.conf
# /etc/nsswitch.conf:
#
hosts: files dns
passwd: files vas3
group: files vas3

root@sho1hsmbk001:/root> cat /etc/rc.config.d/netconf
HOSTNAME="sho1hsmbk001"
OPERATING_SYSTEM=HP-UX
LOOPBACK_ADDRESS=127.0.0.1
.
.
.
INTERFACE_NAME[0]="lan0"
IP_ADDRESS[0]="10.131.0.48"
SUBNET_MASK[0]="255.255.255.0"
BROADCAST_ADDRESS[0]=""
INTERFACE_STATE[0]=""
DHCP_ENABLE[0]="0"
INTERFACE_MODULES[0]=""
INTERFACE_SKIP[0]=""

INTERFACE_NAME[1]="lan900"
IP_ADDRESS[1]="199.68.100.100"
SUBNET_MASK[1]="255.255.255.0"
BROADCAST_ADDRESS[1]=""
INTERFACE_STATE[1]=""
DHCP_ENABLE[1]="0"
INTERFACE_MODULES[1]=""
INTERFACE_SKIP[1]=""
.
.
.
ROUTE_DESTINATION[0]="default"
ROUTE_MASK[0]=""
ROUTE_GATEWAY[0]="199.68.100.1"
ROUTE_COUNT[0]="1"
ROUTE_ARGS[0]=""
ROUTE_SOURCE[0]=""
ROUTE_SKIP[0]=""


root@sho1hsmbk001:/root> nslookup sho1hsmbk001
Using /etc/hosts on: sho1hsmbk001

looking up FILES
Name: sho1hsmbk001.xxxxxxxx.corp
Address: 10.131.0.48
Aliases: sho1hsmbk001, sho1hsmbk001-bk

root@sho1hsmbk001:/root> ping sho1hsmbk001
PING sho1hsmbk001.ally-hosting.corp: 64 byte packets
64 bytes from 199.68.100.100: icmp_seq=0. time=0. ms
64 bytes from 199.68.100.100: icmp_seq=1. time=0. ms

I thought perhaps it was caching somehow and tried rebooting but it still exhibits the same behavior. If I remove the DNS entry from nsswitch.conf the server can still tries to ping itself on the 199. network. I have the same problem if I try pinging any other servers on the private network. I can nslookup and resolve to the 10. address but when I ping that server it pings the public address.

Anyone have any suggestions?

---------- Post updated at 01:54 PM ---------- Previous update was at 12:41 PM ----------

I've got it narrowed down but I still cannot figure out what is going on. If I remove the domain and search path from resolv.conf then it will resolve to the 10. address.

This I do not understand because nsswitch.conf tells it to look at files so it should never look at resolv.conf in the first place.
 

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LEARN ABOUT ULTRIX

nsquery

nsquery(1)						      General Commands Manual							nsquery(1)

Name
       nsquery - name server query command

Syntax
       /usr/ucb/nsquery [ lookup ] [ host ] [ server ]

Description
       The command provides an interface to obtain host name and address information.

       If  you	specify  host,	the command obtains information about the specified host. If no host is specified, the command obtains information
       about the local host system.

       If you specify server, the command queries the BIND server that you specify. If you do not  specify  a  server,	the  command  queries  the
       default BIND server.

Options
       lookup  Retrieves the host name, Internet Protocol (IP) address, and aliases of the specified host.  If no host or server is specified, the
	       command obtains information about the local system from the default BIND server.

	       If you do specify the lookup option, the command obtains the information about  the  BIND  server  and  host  specified	(or  their
	       defaults).   If the system from which you issue the command is a BIND server, and you do not specify the lookup option, information
	       about only that server is retrieved.

Files
       Directory containing BIND server data file

       BIND server boot file

       Host database file containing name to address mapping for BIND primary
			   server

       Host database file containing address to name mapping for BIND primary
			   server

       Local host database file containing address to name mapping for BIND
			   server

       BIND server cache file

       BIND data file

See Also
       nslookup(1), resolver(3), resolver(5), named(8)
       Guide to the BIND/Hesiod Service

																	nsquery(1)
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