comcast dhcp leases

[Pete Snider]

On Tue, Aug 25, 2009 at 9:55 AM, Lloyd Kvam<python at venix.com> wrote:
> On Tue, 2009-08-25 at 09:29 -0400, Mark Komarinski wrote:
>> On 08/25/2009 09:23 AM, jkinz at kinz.org wrote:
>> > Hi all - I notice that  comcast has dropped its dhcp lease times
>> > down to about 15 minutes, it used to be a number of hours, which
>> > is rather longer.   I wonder if its possible to somehow have the
>> > dhcp requests ask for a longer lease period?  Anyone know, how If
>> > its possible?
>> >
>> I don't think you can change the lease time on the client side.
>>
> I assume that you could change it if you could get at the configuration.
>
> (somewhat changing the topic)
> This weekend I got burned by comcast suppressing DNS lookup errors.
> Names that started with www (e.g. www.jjexample.com) that should have
> generated "not found" errors instead returned the IP address of
> search2.comcast.com.  I was setting up a monitor for a new domain
> service and couldn't understand why the monitor was finding a service
> even before the service was running.  comcast thinks that all name
> service requests for www. names originate from people running browsers.
> I finally got an email this morning that my opt out has been processed.
> I filed a grumble with the FCC, but don't know if that will have any
> impact.

I recall an email from comcast about this new feature and that you can
opt. out of the search page and receive the default 'not found' error.

-pete

>
> Perhaps comcast is rolling out this DNS service to more of its network
> and shortening the leases to allow rapid changes to the name servers
> that get specified with the leases.
>
>> They may be getting ready to give you a new IP address or otherwise
>> change your networking configuration.  If that's the case, a 15 minute
>> lease time is advantageous.
>>
>> -Mark
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> --
> Lloyd Kvam
> Venix Corp
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