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Date:      Tue, 26 Jun 2001 20:49:09 -0400 (EDT)
From:      "Ian P. Thomas" <ipthomas_77@yahoo.com>
To:        crist.clark@globalstar.com (Crist Clark)
Cc:        freebsd-questions@freebsd.org
Subject:   Re: cable connection problems
Message-ID:  <200106270049.UAA00734@scraemondaemon.my.domain>
In-Reply-To: <no.id> from "Crist Clark" at Jun 26, 2001 02:44:08 PM

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	You're a genius.  After unplugging the modem and plugging it back in
after disconnecting it from the Windows box, I rebooted and got my IP.
Everything just works now.  It seems that the cable modem was keeping the
MAC in memory when I put the modem into standby.  There is no power off
button so the plug had to be yanked.
	A quick question about firewalls.  I had a firewall setup for my dial
up connection, but I knew the DNS IP's and used the following two lines to
let name lookups and responses go through

$fwcmd add allow udp from any to 207.217.77.82 53 out xmit tun0
$fwcmd add allow udp from 207.217.77.82 53 to any in recv tun0

	How can I allow name lookups if I don't know the DNS IP's?

Ian

In the last episode, Crist Clark stated...
> 
> "Ian P. Thomas" wrote:
> > 
> >         After installing winpcap and ethereal on Windows here is the output
> > from when I did a release to when I did a renew.  I had trouble viewing it
> > with tcpdump -r, it seemed to take awhile and I gave up after a few
> > seconds.
> 
> Turn off name resolution. Use the '-n' option (I wish that was the default).
> Also, you can clear out the ARP noise by putting a '! arp' filter on
> the tcpdump(8) command line.
> 
> > It looks like the problem is with me not specifying myself as
> > hes1_buf_adelphia_net.  Is this the hostname option in DHCP options?
> 
> hes1.buf.adelphia.net (208.246.218.2) is the name of the DHCP server
> that responded too your DHCPDISCOVER broadcast. No one ever responded
> in the other dump.
> 
> > The
> > use of more info on winipcfg gave me this for the hostname of the Win95
> > laptop.
> > 
> > MBA-07100.buf.adelphia.net
> 
> Is MBA-07100 a name you, the manufacturer, or some one else gave to your
> computer? Your machine requested this name and the name is not in DNS.
> 
> Anyway, it all looks like a very typical DHCP negotiation. dhclient(8)
> on your FreeBSD system should work just fine. I still think it is a problem
> with your MAC address. Have you tried to,
> 
>   (1) Remove the Win machine from the network.
>   (2) Power off the modem.
>   (3) Wait...
>   (4) Connect FreeBSD machine.
>   (5) Power on modem
>   (6) Boot FreeBSD machine.
> 
> Yet? If this does not work either, call your ISP. Ask them why you are 
> having trouble moving the connection between machines. This has nothing 
> to do with OS compatibility. DHCP is an Internet protocol and therefore
> is OS independent.
> -- 
> Crist J. Clark                                Network Security Engineer
> crist.clark@globalstar.com                    Globalstar, L.P.
> (408) 933-4387                                FAX: (408) 933-4926
> 
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