linux as router

[Adel ESSAFI]

2009/12/14 Andrew Haley <aph at redhat.com>

> Adel ESSAFI wrote:
> > Hi list
> > This is the first time I have to configure linux as router.
> > I have a single network card for which I gave to IPs
> >
> > eth0      Link encap:Ethernet  HWaddr 00:11:5B:72:7F:D9
> >           inet addr:41.231.X.Y  Bcast:41.255.255.255  Mask:255.255.255.0
> >           inet6 addr: fe80::211:5bff:fe72:7fd9/64 Scope:Link
> >           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >           RX packets:2595 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:2295 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:1000
> >           RX bytes:1876353 (1.7 MiB)  TX bytes:328059 (320.3 KiB)
> >           Interrupt:21 Base address:0x8000
> >
> > eth0:1    Link encap:Ethernet  HWaddr 00:11:5B:72:7F:D9
> >           inet addr:192.168.10.10  Bcast:192.168.10.255
>  Mask:255.255.255.0
> >           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >           Interrupt:21 Base address:0x8000
> >
> >
> >
> >
> > and this is the default route
> >
> > [root at routeur ~]# route
> > Kernel IP routing table
> > Destination     Gateway         Genmask         Flags Metric Ref    Use
> > Iface
> > 41.231.2.0      *               255.255.255.0   U     0      0        0
> eth0
> > 192.168.10.0    *               255.255.255.0   U     0      0        0
> eth0
> > link-local      *               255.255.0.0     U     1002   0        0
> eth0
> > default         41.231.2.81     0.0.0.0         UG    0      0        0
> eth0
> >
>
> That looks alright.
>
> > The problem now, is when I configure a PC with an IP adress 192.168.10.X
> > and I put the gateway as 192.168.10.10, I do not succeed to ping any PC.
> How
> > can I route all the packages from eth0:1 to eth0??
>
> This isn't making very much sense.
>
> What is the address of your gateway?  If it is 41.231.2.81, then it makes
> no
> sense to move it to the 192.168.10 network.
>

Well, I have no great experience with routing  but I am in an internet café
where I have a limited number of addresses.

so  my logical configuration is as follows


ISP  -- ROUTER   41.231.2.81 <--LAN--> 41.231.2.83 My SERVER 192.168.10.10
<--- LAN --> CLients 102.168.10.X

I hope with that figure things are more precise

Thanks for help





>
> If you're trying to set up a local network with NAT forwarding, then
> there's
> more to do.
>
> Andrew.
>
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