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Old 07-25-2019, 10:04 PM   #1
Fox's Mercantile
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AT&T U-verse LAN on eth0 subnet on eth1

I've been using google for the past month trying to find a simple answer for routing. I haven't had any luck, so here I am.

This is what I have:
eth0 is connected to the AT&T LAN from their router/modem.
The modem is
The DHCP information giving to the Linux box
By itself, this works fine. Full connectivity to the inter-tubes.

Because I'm a masochist, I work with Cisco phones.
To facilitate this, I added a second network card eth0.
With a static address of
And have my (Linux) DHCP server pointed at eth1.

I've been playing off and on with Linux since the days of recompile the kernel daily. But I never got into routing.

I use a MacBook to check connectivity, because it just works and it's simple.

If I connect it to eth1 (though a 5-port switch) It doesn't get any DHCP from the Linux box. Even if I give it a static address, I can't ping the Linux box, and vice versa.

Obviously, I'm missing something here.

At the very least, I would like the 192.168.10.x sub-net to work.
Added bonus would be being able to access the inter-tubes from it.

So, which breed chicken do I have to paint yellow and blue, put in a paper bag and wave around over my head?


Thank you in advance.
Old 07-27-2019, 06:21 PM   #2
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I answered your other thread.
Old 07-27-2019, 06:38 PM   #3
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Me too,
.duplicate reported

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