<div dir="ltr"><div>There are three main approaches:</div><div><br></div><div>* Routing a subnet</div><div>* Bridging and filtering</div><div>* NAT</div><div><br></div><div>Depending on the scenario NAT might be the best approach. You can use any of the RFC1918 addresses inside that is not used outside.</div><div>a few DDG searches should get you the interface and firewall commands needed.</div><div><br></div><div>chris<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Sep 12, 2020 at 5:36 PM David L. Willson <<a href="mailto:dlwillson@thegeek.nu">dlwillson@thegeek.nu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-family:arial,helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><div>This feels like a newbie question that should be obvious to me, but it's not obvious to me, so I'll ask.<br></div><div><br></div><div>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?</div><div><br></div><div>Example (the actual case in point):<br></div><div><br></div><div>I have <a href="http://67.42.246.112/29" target="_blank">67.42.246.112/29</a>. 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.</div><div><br></div><div>Is there a way for me to carve the upper or lower /28 (<a href="http://67.42.246.112/28" target="_blank">67.42.246.112/28</a> or <a href="http://67.42.246.120/28" target="_blank">67.42.246.120/28</a>) off into an interior subnet and put it behind an actual Linux box?</div><div><br></div><div>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.<br></div><div><br></div><div>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?</div></div></div>_______________________________________________<br>
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