Re: dhcp, dhclient, and roadrunner

On Sat, 22 Dec 2007 06:23:21 -0500, Dave wrote:

My issue is i'm running a gateway box connected to rr via a linux box.
That's running dhclient from isc as it's dhcp client getting it's ip via rr.
My issue is whenever roadrunner changes my ip, which usually happens when
i'm away, i have to get back here, rerun dhclient on the interface, and
reload the firewall before the new ip is registered. An ifconfig on the
interface shows the old ip still in place even though it's been
reappropriated, and pinging or anything else doesn't work until i do the
reset.

I assume you do NOT have tmdns or avahi* service/daemon running.

Think about it, if the lease is being renewed most of the time
then your firewall is not in the way.

I ran a firewall/gateway box on rr and the only times I had problems
was when the dhcp server or rr gateway box was taking a break.

You would need to look through your logs to see what happened when you
had the outage.

You can create a /etc/dhclient-exit-hooks script to tell you when
lease times, gateway, or ip change. I had one to tell me when lease
times became short indicating they were doing maintenance and I could
look forward to a possible outage.

You could have a daily cron job to ping -c 1 66.94.234.13 (yahoo.com) and
get a copy of files/log to see what happened if the ping fails.
Even restart the network upon failure.

.