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Date: Mon, 02 Oct 2006 10:37:47 -0500
From: "Thomas T. Veldhouse" <veldy@veldy.net>
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Subject: Re: [gentoo-user] Router 3rd and 4th net interface problem
References: <49bf44f10609272119u2cf7d235u34f682e7ff9318d0@mail.gmail.com> <7573e9640609281923y6dbad231qc9ee129f8c462779@mail.gmail.com> <49bf44f10609281943o2e802bfo853e391b5f95de9e@mail.gmail.com> <200609282206.22141.bss03@volumehost.net> <20060929093801.89212bae.hilse@web.de> <49bf44f10610020818y2f270ae0o293cfdd36f0b5871@mail.gmail.com>
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Grant wrote:
>> > > I'm pretty confused. I'm trying to get the system in question to
>> > > behave like a solid-state router that you can plug an ethernet jack
>> > > into and be on the network. How should eth1 and eth2 be configured
>> > > in /etc/conf.d/net ?
>> >
>> > They should be configured as part of a bridge device (see the
>> > bridging section of /etc/conf.d/net.example) and have the address
>> > assigned (and DHCPD listing on) that bridge device.
>>
>> Except that this doesn't work on WLAN (MAC layer done by the WLAN
>> adapter). But probably "proxy_arp" can help here. And subnet
>> separation, of course. Just extending the netmask a bit and enabling
>> proxy_arp would do the job. OTOH, it's also easy to configure the
>> routes to the other subnets via DHCP. Just a matter of taste. In any
>> case, it only works on IP layer.
>
> Sounds like I'm getting in over my head. I think it would be smarter
> for me to buy a $15 switch from NewEgg instead of trying to configure
> my Gentoo router to use its extra NICs this way. Is there any reason
> I wouldn't want to do that?
Use a switch. Using multiple interfaces to act as a switch is a waste
of a good interface. Interfaces are better used to isolate networks
from each other. I have one for my WAN, one for my LAN and one for my
WIFI LAN. The latter is a very restricted area in case somebody hacks
the WPA encryption on my WIFI, they still won't have real access to
anything important.
Each interface should have its own network, except in rare cases where
bridging is desired.
Tom Veldhouse
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