[ale] Odd network setup w/ iptables NAT routing

[Michael Trausch]

Will maybe look into one of those. Trying to get AT&T to just replace the
stupid thing now.

I may look at, in the longer term, getting an internal adsl modem. First,
though, I need to learn how they go about getting the multiple static IPs
delivered. It is something to do with RIP, that's all I have discovered thus
far.

--
Sent from my HTC Dream---Running Froyo!
Thanks, @cyanogen!

On Jul 14, 2010 12:12 PM, "Greg Clifton" <gccfof5 at gmail.com> wrote:
> Mike,
>
> 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.
>
> GC
>
> On Wed, Jul 14, 2010 at 10:59 AM, Michael B. Trausch <mike at trausch.us
>wrote:
>
>> On Wed, 2010-07-14 at 08:35 -0400, James Sumners wrote:
>> > I understood your situation to be that you have two external
>> > connections coming into the firewall 24/7. That is, DSL on eth0 and T1
>> > on eth1 (or whatever, I've never dealt with a T1).
>>
>> That would be correct.
>>
>> > I thought the "manual" part was all done at a keyboard. Now I
>> > understand that you have to unplug the DSL connection from the
>> > firewall and plug in the T1? If that's the case, well, I don't know
>> > what to suggest in regard to the two networks.
>> >
>> This is also correct. I'm just not sure that I understand what bridging
>> the two interfaces together would accomplish. Basically, I have the DSL
>> attached to eth0, the LAN attached to eth1, and the T1 line attached to
>> eth2. When packets stop going across eth0 (which I can adequately
>> determine by using "ping -c4 <default gateway> > /dev/null" and checking
>> the status code), I need to trigger a failover to the eth2 device. Of
>> course, I only had the light-bulb moment about checking the default
>> gateway late last night... the DSL modem provides the default gateway.
>>
>> > I assume you're just power cycling the AT&T modem? I'm fairly positive
>> > that you will not be able to power cycle that thing remotely. I'd be
>> > shocked if AT&T offers anything that useful. You might look into a PCI
>> > modem[1]. Then you can remotely take the interface down and bring it
>> > back up via your dial-up connection.
>>
>> To make things more complicated, this is something of a nonstandard
>> setup. I think that if I print out the whole configuration listing on
>> the advanced configuration page, I can probably mirror the
>> configuration. What I *don't* know about DSL is if you have to register
>> the device on the network before being able to use it. I know that at
>> least with cable modems, you have to have the network provider whitelist
>> the hardware address of the modem so that they will talk to it. Perhaps
>> since DSL authentication is done using PPPoE, that is different? I
>> don't know.
>>
>> I will check into the PCI modem, though, because that would very likely
>> solve all of the issues that I have. I'll just need to figure out
>> exactly how they are tunneling the static IP addresses to me; the modem
>> picks up a dynamic address over PPPoE and then uses that to gateway the
>> static IP addresses. If everything works out perfectly with this, I
>> would be able to use all 6 addresses in the /29 that is allocated to us,
>> instead of giving up one for the modem... that would be nice.
>>
>> Is it too much to expect of any service provider to just work and to
>> provide hardware that just works? I'm beginning to think that it is
>> indeed too much of an expectation.
>>
>> --- Mike
>>
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