RE: Homeseer and Dyndns

["Paul Gordon" <paul_gordon@xxxxxxx>]

Well, I just did a spot of investigation into this, and did the following:

STOPPED my internal DNS service,
Put my main server online, & ran the dynamic DNS client to register the
IP,
Checked the dynamic registration on the dynDNS.org website - all correct.
PING'ed the FQDN from that server - resolved & replied correctly,
PING'ed the FQDN from my "troublesome" client - failed, -
resolved to the
PREVIOUSLY registered IP for the Server..
checked the DNS cache on that client with IPCONFIG /displaydns - NO entrry
for either the domain or IP in question.. - only entries put there by my
hosts file for some server at work that I occasionally connect to.
FLUSHED the client's DNS cache anyway with IPCONFIG /flushdns, and checked
it again - exactly the same entries as before - as they come from my hosts
file.
HUNG UP the connection at the server, and RECONNECTED it, to get a new IP
address assigned, & RE-RUN the above tests. This time, the client
resolved
the IP address that I had just released, - IE the troublesome client always
"seems" to resolve the 1-previous IP address...
PHONED UP a mate, and got him to PING the FQDN, - he resolved it correctly
&
got a reply...

Confused?

Me too!

Where the **** is this being cached?

Paul G.




>From: Paul Miller <pmiller@xxxxxxx>
>Reply-To: ukha_d@xxxxxxx
>To: ukha_d@xxxxxxx
>Subject: RE: [ukha_d] Homeseer and Dyndns
>Date: Tue, 20 Mar 2001 15:11:55 -0000
>
>that was next question :) if it was the DNS cache have you tried
>flushing it. I can't seem to locate the Timeout value in the registry,
>although I believe its normally set to 5 mins by default.
>
>Good luck
>
>please advise when you sort it out - I would be interested in the
>solution.
>
>Paul
>
>-----Original Message-----
>From: Paul Gordon [mailto:paul_gordon@xxxxxxx]
>Sent: 20 March 2001 14:55
>To: ukha_d@xxxxxxx
>Subject: RE: [ukha_d] Homeseer and Dyndns
>
>
>AHA!  -  there's a new switch I hadn't yet discovered! - not seen the
>/displaydns switch before! I see there is also a /flushdns to empty the
>resolvers cache. - I'll try that later tonight when the server goes
>online..
>
>I was sure it was the resolver cache anyway, as I intimated in my
>earlier
>post.
>
>Thanks for pointing that one out!
>
>Paul G.
>
> >
> >Paul,
> >
> >your w2k problem is the issue one of the arp cache still having
the
>info
> >(arp -a) or is it still in the dns cache (ipconfig /displaydns)?
> >
> >
> >
> >-----Original Message-----
> >From: Paul Gordon [mailto:paul_gordon@xxxxxxx]
> >Sent: 20 March 2001 09:47
> >To: ukha_d@xxxxxxx
> >Subject: Re: [ukha_d] Homeseer and Dyndns
> >
> >
> > >
> > >But to see this web page I must lookup my IP using the dyndns
web
>page
> >and
> > >then type in this IP address into IE.  Is there any way I can
just
>put
> >in
> >
> >
> >That kinda defeats the object!!
> >
> >
> > >webpage address that is the same all the time. (what is the
name of
>the
> > >homeseer web page, I cannot find this anywhere as it seems to
be too
> > >dynamic)
> >
> >The whole point of dynamic DNS is to be able to do exactly that.
The
> >name
> >would/should be whatever name you >choose< to register
beneath the
> >Dynamic
> >DNS service providers domain name, for example,
> >"www.ianshouse.dyndns.org"
> >then as long as you have a DDNS client that correctly updates your
> >dynamic
> >registration(s) with that service (and does so promptly!), then
> >resolvers
> >should be able to use that name to find your webserver.
> >
> >The fact that when you go to the DDNS webpage and look up your IP
> >address,
> >and find that is is correct and current, (as proved by the fact
that
> >browsing to it gets to your HS webpage), proves that your client
update
> >is
> >occurring quite correctly...
> >
> >I would then look at the configuration of the resolvers... Do you
have
>a
> >
> >cacheing DNS server between your resolver and the DynDNS server?
> >
> >I have a very similar problem at the moment with some W2K
workstations,
> >- I
> >also use the DynDNS service, and a Dynamic DNS client to register
my
> >Home
> >webserver (NT4 server & IIS4), which redirects incoming HTTP
requests
>to
> >my
> >internal Homeseer webserver. I find that the dynamic update
portion
> >works
> >perfectly, IE when my server's IP address changes, the client
correctly
> >updates the dynamic registration, and does so very quickly.
Checking
>the
> >
> >DynDNS webpage therefore shows the correct IP address, just as in
your
> >case.
> >However, I then find that some PC's on my internal LAN can ping
the
>FQDN
> >
> >correctly, while others cannot, due to resolving an incorrect
(earlier)
> >IP
> >address. My internal LAN also has a cacheing DNS server AND A
proxy
> >server
> >(also on the same NT4 & IIS4 box), and my internal clients use
ONLY
> >these
> >internal services. My initial belief was that my internal DNS
server
>was
> >
> >caching the IP address for the FQDN from an earlier lookup, and
issuing
> >that
> >to subsequent requests, - EVEN after the server had disconnected
&
> >reconnected and obtained (and registered)a different IP. However,
I've
> >looked in MY DNS servers' cache, and I cannot see it, so that
doesn't
> > >seem<
> >to be the case...
> >
> >I haven't got to the bottom of this yet, but I think I may have
> >determined
> >that W2K clients and Win9X clients behave differently in how they
> >perform
> >DNS queries,... I am still investigating, so I'll let you know
if/when
>I
> >
> >figure it out...
> >
> >Anyone a Whizz on DNS care to chime in?....
> >
> >
> >Paul G.
> >
> > >
> > >I noticed an earlier mail where someone had put up a wiring
diagram
>and
> >
> > >this
> > >was done using dyndns.  Can I do this too.
> > >
> > >IanW
> >
>
>_______________________________________________________________________
>_
> >_
> >Get Your Private, Free E-mail from MSN Hotmail at
> >http://www.hotmail.com.
> >
> >
> >
> >
> >
> >Your use of Yahoo! Groups is subject to
> >http://docs.yahoo.com/info/terms/
> >
>
>________________________________________________________________________
>_
>Get Your Private, Free E-mail from MSN Hotmail at
>http://www.hotmail.com.
>
>
>
>
>
>Your use of Yahoo! Groups is subject to
>http://docs.yahoo.com/info/terms/
>

_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.