Re: linux as router

I don't think that it makes sense to configure a router with one physical
network card. If another PC on the same cable segment tries to reach
something it needs a router that has connection with more than the same
network cable.

greetings, paul

2009/12/13 Adel ESSAFI <adelessafi@xxxxxxxxx>

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@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


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??


note that I have configured the ip forward.

echo 1> /proc/sys/net/ipv4/ip_forward

Can you help me please.

regards





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