On Thu, 14 Aug 1997, John Cosimano wrote:
The original post:
| I have a strange problem I've not seen before and wonder if anyone can
| give me a bit of direction.
| I'm on a SunOPS 4.1.3 host and run nslookup against a host, say
| bing.foo.bar.com. The nslookup is successful and returns the ip address.
| If I then try and telnet to the hostname, telnet fails and tells me
| unknown host. But if I telnet to the ip address nslookup just gave me, it
| works fine.
| This seems like odd behavior and I'm not sure how to fix it. I'm not
| running NIS or NIS+, but I am running split DNS on a firewall. Not sure if
| that makes a difference, but perhaps so.
Tim Evans <email@example.com> was the first to respond with:
SunOS 4.1.x does *not* support DNS unless you use NIS. The
'nslookup' command itself and a special version of sendmail named
'sendmail.mx' are exceptions to this. See the FAQ for details.
Peter M Allan <firstname.lastname@example.org> then responded with:
To use DNS under SunOS 4.1.x you need either
NIS (a slim & otherwise useless NIS will do)
or DNS-enabled libraries
>From the FAQ:
Subject: 3.1) How do I set up NIS/YP to use DNS?
Under SunOS 4.1.x, there is a "#B=" at the top of /var/yp/Makefile,
uncomment and change this to "B=-b" and setup NIS in the usual
fashion. Under 4.0.x, edit the Makefile or apply the following
Both pointed me to the FAQ, which I have, but did not consult before
making a post :-( Many others responded as well and my mail box is
receiving responses as I write this. So those who do not make it in here -
thanks for taking the time to respond to me. I continually get a lot of
good information from this list and I appreciate it.
-- John Cosimano Unix Systems Administrator The CNA Corporation Alexandria, VA USA email@example.com
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