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

[serfsmith at gmail.com]

On Monday, February 15, 2016 at 6:24:04 PM UTC+2, Stephen Hoffman wrote:
> On 2016-02-15 09:20:10 +0000, Eric said:
> 
> > We are experiencing a strange problem with our Telnet server.  Despite 
> > updating the system DNS resolver settings, when connecting to the 
> > Telnet server, it tries to do a reverse lookup on the client's source 
> > IP.
> 
> You could configure your DNS server to have a proper reverse zone for 
> the IP address range involved.
> 
> Probably via the $GENERATE syntax listed in section 6.3.6 in 
> http://www.bind9.net/arm910.pdf
> 
> (Yes, that's the ISC BIND 9.10 manual; current.   That's not what 
> OpenVMS has, if you're using OpenVMS as your DNS server.   I checked 
> the BIND binary for what appears to be support for $GENERATE, as the 
> BIND 9.3.1 version provided with OpenVMS is ancient.  $GENERATE has 
> been around for a while, so you're running your DNS server on some 
> other implementation of ISC BIND, then it's almost certainly newer than 
> what OpenVMS offers with TCP/IP Services.)
> 
> I'd suspect this is associated with accounting.  Off-hand, I don't know 
> of a way to disable it.
> 
> 
> -- 
> Pure Personal Opinion | HoffmanLabs LLC

The problem being that these are dynamic DNS entries, updated by the local DHCP facility.

I have confirmed that putting an entry for my workstation IP in the local database (ala SET HOST) makes the delay go away.  All works until my IP changes, of course.