[SFS] networking question

[James Snell]

I did, thanks!


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On Sunday, September 13, 2020, 3:41 PM, Chris Fedde <chris at fedde.us> wrote:

There are three main approaches:
* Routing a subnet* Bridging and filtering* NAT
Depending on the scenario NAT might be the best approach.  You can use any of the RFC1918 addresses inside that is not used outside.a few DDG searches should get you the interface and firewall commands needed.
chris

On Sat, Sep 12, 2020 at 5:36 PM David L. Willson <dlwillson at thegeek.nu> wrote:

This feels like a newbie question that should be obvious to me, but it's not obvious to me, so I'll ask.

If I have a subnet behind my router, and I want to put *part* of that subnet (a sub-subnet?) behind an interior router (sub-router?)... Can I do that?
Example (the actual case in point):

I have 67.42.246.112/29. It routes through 67.42.246.126. I have control of 67.42.246.126. It's not Linux, but it's not entirely brainless, either.
Is there a way for me to carve the upper or lower /28 (67.42.246.112/28 or 67.42.246.120/28) off into an interior subnet and put it behind an actual Linux box?
Come to look at it, I guess it would have to be the lower half, or I'd have to re-number my router. Not the end of the world, but no sense adding pointless work, either.

I know I lose three addresses in the process for the new network, router, and broadcast address, but is it *possible*? Does it work? If so, could I get a hand setting it up?_______________________________________________
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