[VoIP] CNET DNS

[Lee Spenadel]

If the IP changed from the ISP, then I would expect the problem to be a
result of the dynamic DNS service not being updated in an expeditious
timeframe.  I see this with customers who peg their VPNs to remote offices
using dynamic DNS services that don't either catch an IP address change from
the ISP or are not set to update at quick enough intervals.  

It is possible that a DNS would cache the old address for some period of
time, but I'd double-check that the dynamic DNS client on whatever PC
platform it's being run on is updating properly.  I use no-ip.com and it's
been very good at updating DNS for me.

Lee

-----Original Message-----
From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of
John Novack
Sent: Sunday, April 29, 2007 10:29 PM
To: Voice Over IP Tandem for Analog Switches
Subject: Re: [VoIP] CNET DNS

To add insult to injury, my ISP has been off the air for hours, or got 
itself in a tailspin with my modem and router.
After I powered all off and back on, several minutes later it comes to life.
Concast has its problems from time to time.
I hate to say it, but the BIG V has a point - VOIP isn't as reliable as 
the old PSTN.
But that still doesn't give them the right to charge sky high and try 
and put others out of business.
666 is back on line, for the moment anyway.
The problem Paul had that I saw the other day was  that his IP changed, 
dyndns had it updated, but the macro still was trying to send to the old 
IP address.
Greg, Kirt and I went through a similar mystery some time back, never 
did track down the source of the problem, but reached the conclusion 
that it was our ISP.
Both Kirt and I are under the "skillful" thumb of Concast. Greg thought 
they may be doing some caching that we are not aware of.
If that is true, other ISP's could be doing the same thing.
Anyone else have any thoughts?

John Novack


Paul Wills wrote:
> ----- Original Message ----- 
> From: "Greg Blakely" <greg at vyger.net>
> To: "Voice Over IP Tandem for Analog Switches" <voip at ckts.info>
> Sent: Sunday, April 29, 2007 6:27 PM
> Subject: Re: [VoIP] CNET DNS
>
>
>   
>> Not with regards to DNS, as there are actually four of them, so, if one
>> is not reachable, the other three are available to answer queries.
>>
>>
>>     
>
> Does anyone know if there are any changes that an upgrade from Asterisk
1.2 
> to Asterisk 1.4 would require in the configuration files that would affect

> incoming calls.  The outbound macro was replaced but that should make no 
> difference in this case.
>
> PDW 
>
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