I just received this private reply to a response I posted on the list. As
it is of general interest (or should be), I forward it intact, with my own
comments at the end.
At 10:49 AM 7/31/02 -0700, Du atyahoo wrote:
>
> > Superficially, your symptoms sound like MAC
> > authentication problems. Except
> > that you can connect two other, different machines
> > successfully (the
> > Mandrake and Windows hosts are different physical
> > machines, right? not a
> > dual-boot box?).
>Yes, it is a dual boot box. So the Mandrake and
>Windows use the same NIC to connect. I just tried to
>use another machine, which has a different NIC to
>connect DIRECTLY to cable modem. This is a Windows
>2000 machine and the IP I received on this machine is
>10.24.4.42. So I am pretty sure this is a MAC
>authentication issue. I am gonna talk to my cable
>guy.
>
>So basically, the only machine I can use to connect to
>the cable modem is my Mandrake/Windows dual box. My
>other machines including the Firewall machine can NOT
>get correct IP from the cable modem. I guess
>somewhere when I was moving them around and before the
>new lease was issued by the MediaCom DHCP server, it
>took the MAC
>of my Mandrake duel boot box as the one to use.
>
>Thanks for the help, I will keep you posted.
I don't want to belabor this too much, but we are starting to see a
systematic problem here. In the last day, we have had THREE cases where
LEAF distros failed to get a DHCP lease due to MAC-address-authentication
problems. In all three cases, the original posting did not include the
information needed to spot this as the problem, because the poster
described use of a dual-boot machine as though it were two
separate hosts, -OR-
did not specify correctly the order in which he connected test
hosts to the ISP, -OR-
... well, I forget the specific problem in the third case
Newcomers posting troubleshooting problem should learn from this and be
very clear about the details of tests they do that involve varying the
hardware connected to the ISP (especially cable-modem setups, but really
all setups). There is a real sense in which getting a firewall/router to
work (ANY firewall/router, not just LEAF) involves outsmarting your ISP, so
you need to pay attention to what you "tell" your ISP, even what you tell
it inadvertently.
Mike ... should we add something about this to the SR FAQ? Or is it too
passing a problem to warrant that (I don't want to see the SR FAQ grow too
big, since even now we seem to have trouble getting people to read it, or
at least to do what it says)?
--
-----------------------------------------------"Never tell me the
odds!"--------------
Ray Olszewski -- Han Solo
Palo Alto, California, USA [EMAIL PROTECTED]
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