When DNS over DHCP breaks?

[gaf at gaf.blu.org (Jerry Feldman)]

Duane,
Sounds like either your router is not working or your ISP's DHCP server
is broken. 
Is your staticly connected box connected directly to the cable modem (or
DSL) or is it connected directly to the router?

Assuming your cable or DSL connection and equipment is working
correctly:
I would take the following steps:
1. Bypass ther router and connect your DHCP client machine directly to
the DSL or cable modem. If everything works, we can assume the problem
is at the router end. If not, the problem is with your cable/DSL
equipment or your ISP. 
2. reboot the router, reconnect it and check all the settings. You
should be able to find the assigned IP address and the appropriate DNS
server. 
3. If the router seems to be the problem, reset the router to factory
settings and re-input the various settings. Possibly even reflash the
firmware. 
4. If things still don't work and you are sure it is the router, if you
live in a high rise, take it up to the roof and tell it to make like a
bird. If you don't have easy access to a high rise, just drop it out of
your car on 128. 


On Wed, 12 Feb 2003 14:38:29 -0500
Duane Morin <dmorin at morinfamily.com> wrote:

> This morning one of my machines, which is connected via DHCP to my
> router, apparently stopped doing DNS properly.  I am guessing this
> because all of the operations from that machine that connect directly
> to an IP, i.e. my mail program, work fine, but attempt to go to a web
> site by name fails.
> 
> My statically configured box which has /etc/resolv.conf with 3
> nameservers in it continues to work fine (although I have not rebooted
> it lately).  Anybody got suggestions on what might be going wrong with
> this machine, and where I can start looking?  I tried telling it the
> DNS servers (while keeping it on DHCP) but that failed.
> 
> Ok, wait, tried a few things and it's weirder than I thought.  Any
> attempt to ping addresses by number outside of my own domain fail as
> well, which suggests I don't have a connection to the outside.  I do
> have a connection to the inside of my network, though, so I know that
> I have wireless at least.  So I guess what's happening is that my
> router has decided to stop allowing this machine to connect to the
> outside world?  Why would that be?  I have confirmed that my other
> machine can connect to outside machines both by name and number, and
> look things up in dns.
> 
> This is an XP machine, in case that matters.  The static box that's
> working is Linux (of course).
> 
> Duane
> 
> _______________________________________________
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