Re: 20060106: Sending data through LDM to ground from aircraft with changing ip address address@hidden

Janet and Steve,

One can play quite a few different games with host based name resolution
including both with /etc/hosts and DNS resolvers.  It is possible to
configure short TTL's for specific entries.

Janet -- can you give us a more complete idea of how the aircraft IP is
assigned (by an ISP?), do they also provide DNS, how large is the likely
range of available IP addresses, under what circumstances will the IP
address change.

It seems like a point-to-point VPN might work well for this scenario?

mike

On Jan 9,  8:31am, Steve Emmerson wrote:
> Subject: Re: 20060106: Sending data through LDM to ground from aircraft wi
> Janet,
>
> >Date: Sat, 07 Jan 2006 09:12:19 -0700
> >From: Unidata Support <address@hidden>
> >To: Janet Scannell <address@hidden>
> >Subject: 20060106: Sending data through LDM to ground from aircraft with
changing ip address
>
> The above message contained the following:
>
> > If a DNS server can resolve the name <-> IP address relationship, then
> > you can request the data from the plane by name rather than by IP.  The
> > tricky part would be updating the DNS entry as soon as the IP is
> > fixed.  I guess that the ground system could run a cacheing DNS server
> > and there could be a process running that determines the current IP of
> > the host on the plane and then forces an update of the DNS entry.
>
> Can the name-to-IP-address entry be tagged with a short time-to-live
> (e.g., 5 minutes)?
>
> Mike?
>
> Regards,
> Steve Emmerson
>-- End of excerpt from Steve Emmerson