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| From | szr <szr@sREzMOrVEoman.com> |
| Newsgroups | comp.os.linux.networking |
| Subject | Quick question about routing |
| Date | Fri, 26 Apr 2019 19:17:48 -0700 |
| Organization | NewsGuy.com |
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Ok, I have a LAN with the following notes: 192.168.1.254 - Main router / default gateway for LAN 192.168.1.4 - Linux server (eth0) 192.168.1.8 - Windows laptop Linux server (192.168.1.4) has ip(v4) forwarding enabled. As an experiment I added an ip, 10.0.0.4, as eth0:0. Then I added a static route for 10.0.0.0/8 using 192.168.1.4 as the gateway on the main router. After that, I ran `ping 10.0.0.4` from the Windows laptop and the ping was successful. While I do have plenty of networking experience and I'm not surprised that this worked, one thing sort of bugs me. I'm able to ping an ip in the 10.0.0.0/8 subnet from a host that only has an ip in the 192.168.1.0/24 subnet. I know that the laptop is using the route from the default gateway (the main router) but how exactly is the ping getting back when the source of the ping isn't coming from another 10.0.0.0/8 address? Is this more due to ip forwarding, or because it's on the same physical network segment? Again, I otherwise have a very good understanding of networking, but I can't seem to resolve this scenario completely in my mind, and would really like to know what exactly is happening here that allows the round trip to occur successfully. -- szr
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Quick question about routing szr <szr@sREzMOrVEoman.com> - 2019-04-26 19:17 -0700
Re: Quick question about routing William Unruh <unruh@invalid.ca> - 2019-04-27 03:02 +0000
Re: Quick question about routing Pascal Hambourg <pascal@plouf.fr.eu.org> - 2019-04-27 09:14 +0200
Re: Quick question about routing Theodore Heise <theise@panix.com> - 2019-04-27 14:28 +0000
Re: Quick question about routing szr <szr@sREzMOrVEoman.com> - 2019-04-27 08:03 -0700
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