Fedora Box with TWO NIC's
John Meagher
jmeagher at patriot.net
Sat Aug 21 14:55:21 UTC 2004
Julian Underwood wrote:
>
> Dear Fedora List,
>
> This message isn't totally "On Topic" but my question refers to a
> Fedora box which will soon act as a server. Plus I find the people on
> this list to be very knowledgable. My quesiton may be consitered
> "basic networking" but maybe someone can help me.
>
> I have a Fedora box with two working NIC's:
>
> DSL, static IP:
> (NIC 1)
> ip:168.101.199.6
> nm:255.255.255.248
> gw:168.101.199.5
> dns:168.101.1.3, 168.101.1.9
>
> LAN, has a sonicwall router to Cable modem:
> (NIC 2)
> ip:192.168.0.7
> nm:255.255.255.0
> gw:192.168.0.1
> dns:not needed
>
> With this setup, /nothing/ works. Can't ping anything, can't browse
> from the box locally, nothing. However if I remove the gateway on NIC
> 2 (192.168.0.1), then I can at least browse through NIC 1 and it can
> be pinged. However--the LAN interface is still useless, can't ping it.
>
> The reverse works the same. Remove the GW on NIC 1 (168.101.199.5)
> and place it on NIC 2 (192.168.0.1) then I can browse through NIC 2 on
> the Cable modem side, but then the DSL NIC becomes useless (can't ping).
>
> So I am asking, what is the trick to make BOTH interfaces work and if
> the server needs to go out onto the net, it will by default browse out
> on the DSL side of things? I would like to be able to manage the
> server and provide file services from the LAN side.
>
> I would assume adding a route rule would be in order, but I'm unsure
> of what to put. Can anyone help? TIA,
>
> Julian
>
>
You need to have the default route set to the cable modem and a specific
route in place for the internal lan, so that for everything except the
internal lan, it will go out to the cable modem. Do a "netstat -nr",
or a "route print", and let's see what you have.
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