On Thu, 29 Oct 2020 at 05:31, Aero Maxx D <aero.max...@gmail.com> wrote:
> Hello, > > I’m new to this group and to shorewall also. I’ve read the installation > and configuration guides for two interfaces, but I’m not sure they match > the setup I have at home. > > I currently have the following two pieces of DCE equipment, and would like > a PC running shorewall between them. > > 1. Cable Modem/Integrated router from ISP. > 2. Third party router I bought myself. > > That's the same as I have. > I currently have the Cable Modem from my ISP in modem only modem, and a > single link to the third party router. > > I have inserted my Shorewall box in the link between the ISP modem and my own router (so a two-interface configuration). I haven't changed the setup on my ISP Modem. My own router is configured as an extension (sorry I can't remember the exact name of the configuration). > The IP issued to the cable modem is dynamic so may change I’m unsure > whether this has happened or not. > That shouldn't matter. The ISP modem will have a static, inward facing IP address which is the one Shorewall needs to know. > > So I’m wondering if I should use the ISP issued cable modem and router as > intended, and have a single link from it to the shorewall PC and a single > link to my third party firewall on a different 192 subnet. > That sounds right to me. I have set up separate Wi-Fi networks on the two routers. I use the ISP router for my 'Internet of Things' and other untrusted devices, and my own router for the devices I control. > The two interface configuration guide uses 10 subnet and I’m not going to > have that many devices connected in my house. > I don't think that's a problem. HTH
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