[Info-vax] Telnet DNS Problem (OpenVMS 8.4, Itanium)

[serfsmith at gmail.com]

On Wednesday, February 17, 2016 at 5:35:02 PM UTC+2, Stephen Hoffman wrote:
> On 2016-02-17 14:33:47 +0000, serfsmith at gmail.com said:
> 
> > Well no ... it *is* true that the DNS/DHCP servers are not correctly 
> > configured at present to provide a correct answer to PTR queries (as 
> > shown below from my workstation):
> > 
> > C:\Users\smithe>hostname
> > 2744-b46c
> > 
> > C:\Users\smithe>ping -4 2744-b46c
> 
> That's not reverse DNS; IP to name.   That's forward DNS; name to IP.   
> To see reverse DNS:
> 
> dig -x 192.168.55.2
> 
> The tenet server has the IP address.   For logging, it'll want the 
> associated host name, if there is one.   That's reverse DNS.
> 
> 
> -- 
> Pure Personal Opinion | HoffmanLabs LLC

Yes Stephen, I included the ping -4 bit merely for context (to show my workstation IP address), I wanted to illustrate the fact that our DNS/DHCP setup presently doesn't resolve reverse queries.  The bit that actually shows this is the nslookup invocation with contextual DNS record type selection (PTR) and query with my IP address.

The point is: the fact that dns.acme.org (if you look at the output you'll see that my attempt to obfuscate all *real* server names throughout this thread was foiled there) doesn't resolve reverse queries properly is a red herring; I've isolated the problem to TELNET (apparently) not invoking the official means of resolving DNS records, that is: NAME_SERVICE.