I also have the charter service, though not using leaf on it.  I have a
linksys plugged into the cable modem.  The linksys receives the address
via dhcp, with the linksys serving addresses to my internal network. 
I'm out of the Kennewick, WA branch.  While not daily by any means (but
very frequently), I have noticed that the charter network seems to fade
away totally out of the blue.  When this has happened, I usually try to
ping a known fixed IP down the road a ways, just to see if the charter
dns servers are hosed, or if it is a network connection issue.  The
greatest majority of the time it has been a network connection issue
within the charter entity.  And when it has gone on for more than a few
minutes I have called it in.  When I have been able to contact one of
the good techs, it turns out that they show multiple cable modems off
line, which points them back to something internal on their end.  A long
story for which I appologize, but thought I would offer it in view of
the questions and issues Dr. Tibbs refers to.

>From what I have been told by multiple charter techs, they only use dhcp
for home clients.  From my experience the "flakiness" is a result of
network connection issues within charter, and not DNS issues.  DNS is
usually the first indication of network connectivity issues, but from
this end hasn't been the root cause of the connection problems.  When
Dr. Tibbs starts having the DNS issues, watch the lights on the modem,
and you will notice that the modem is really acting spazzy and that the
"online" light will not be on steady.

Just my 25 cents to hopefully cast a little more light on the subject. 
Dachstein isn't the only "firewall" that has issues on charter.

"Dr. Richard W. Tibbs" wrote:
> 
> The LAN hosts are configured manually with the DNS servers from Charter.
> Rather not do it this way, but I couldn't seem to get dnscache to serve
> up names.   Hope to resolve this with a newer Dachstein or other leaf.
> 
> Over 3 million boxes unpacked.... only a few thousand more....
> 
> Brad Fritz wrote:
> 
> > On Sun, 28 Jul 2002 09:39:48 EDT Dr. Richard W. Tibbs wrote:
> >
> >
> >>The Dachstein
> >>firewall has allowed access more-or-less continuously for several days
> >>now, since the last reboot.  The "less" part has been that every so
> >>often it appears that DNS service "goes away", that is hosts become
> >>unreachable.  I can still ping the firewall's gateway addr
> >>(192.168.1.254) during these periods.
> >>The lease periods on the cable side of the firewall are 4-hour leases,
> >>and the internal side of the firewall gives IP leases of 12 hours.
> >>
> >   So possible explanations include
> >
> >>1) temporary lease "fumbling" every 4 hours.
> >>2) flaky, overloaded DNS servers at Charter (what a surprise...)
> >>
> >
> > If you're running DNS cache on the router and the LAN hosts are
> > using it, the answer to #2 is probably no.  dnscache should start
> > with the root name servers and work their way down to resolve
> > names.  Charter's DNS servers should be bypassed completely unless
> > you're resolving a name for which those DNS servers are
> > authoritative.  The exception is if you explicitely configure it
> > to forward all queries or certain domains to Charter's DNS servers.
> > (I've been jumping around in leaf-user postings, so forgive me if
> > you indicated you are using such a setting in an earlier posting.)
> >
> >
> >>Let me pursue a more recent Dachstein (or maybe Bering?) and see if the
> >>problem persists.
> >>
> >
> > Good idea.
> >
> > --Brad
> >
> >
> >
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