Mike,<br><br>If you just need to power cycle the DSL modem, there a number of manufacturers that offer remotely controller PDU devices (APC, Tripp Lite, etc.). Many of these are IP addressable now, but I seem to recall that serial versions are/were available in times past and perhaps even devices with a modem built in. I take it that you couldn't use an IP addressable device, since you loose the connection until you cycle the DSL modem? If you had a managed PDU device with a dial up modem, you could power the DSL modem down remotely, but no doubt this solution would cost more than a simple internal modem in the box.<br>
<br>GC<br><br><div class="gmail_quote">On Wed, Jul 14, 2010 at 10:59 AM, Michael B. Trausch <span dir="ltr"><<a href="mailto:mike@trausch.us">mike@trausch.us</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im">On Wed, 2010-07-14 at 08:35 -0400, James Sumners wrote:<br>
> I understood your situation to be that you have two external<br>
> connections coming into the firewall 24/7. That is, DSL on eth0 and T1<br>
> on eth1 (or whatever, I've never dealt with a T1).<br>
<br>
</div>That would be correct.<br>
<div class="im"><br>
> I thought the "manual" part was all done at a keyboard. Now I<br>
> understand that you have to unplug the DSL connection from the<br>
> firewall and plug in the T1? If that's the case, well, I don't know<br>
> what to suggest in regard to the two networks.<br>
><br>
</div>This is also correct. I'm just not sure that I understand what bridging<br>
the two interfaces together would accomplish. Basically, I have the DSL<br>
attached to eth0, the LAN attached to eth1, and the T1 line attached to<br>
eth2. When packets stop going across eth0 (which I can adequately<br>
determine by using "ping -c4 <default gateway> > /dev/null" and checking<br>
the status code), I need to trigger a failover to the eth2 device. Of<br>
course, I only had the light-bulb moment about checking the default<br>
gateway late last night... the DSL modem provides the default gateway.<br>
<div class="im"><br>
> I assume you're just power cycling the AT&T modem? I'm fairly positive<br>
> that you will not be able to power cycle that thing remotely. I'd be<br>
> shocked if AT&T offers anything that useful. You might look into a PCI<br>
> modem[1]. Then you can remotely take the interface down and bring it<br>
> back up via your dial-up connection.<br>
<br>
</div>To make things more complicated, this is something of a nonstandard<br>
setup. I think that if I print out the whole configuration listing on<br>
the advanced configuration page, I can probably mirror the<br>
configuration. What I *don't* know about DSL is if you have to register<br>
the device on the network before being able to use it. I know that at<br>
least with cable modems, you have to have the network provider whitelist<br>
the hardware address of the modem so that they will talk to it. Perhaps<br>
since DSL authentication is done using PPPoE, that is different? I<br>
don't know.<br>
<br>
I will check into the PCI modem, though, because that would very likely<br>
solve all of the issues that I have. I'll just need to figure out<br>
exactly how they are tunneling the static IP addresses to me; the modem<br>
picks up a dynamic address over PPPoE and then uses that to gateway the<br>
static IP addresses. If everything works out perfectly with this, I<br>
would be able to use all 6 addresses in the /29 that is allocated to us,<br>
instead of giving up one for the modem... that would be nice.<br>
<br>
Is it too much to expect of any service provider to just work and to<br>
provide hardware that just works? I'm beginning to think that it is<br>
indeed too much of an expectation.<br>
<div><div></div><div class="h5"><br>
--- Mike<br>
<br>
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