Help!

I have a linux (RH7.3) router wich i wish to use with 2 network cards connecting to the internet via modem.

eth0 is a 10mbs card
eth1 is a wireless card

I currently can ping the router etc via eth0
I can't ping the router via eth1

when I block the ip address of the machine attempting to access the router via eth1, using iptables, my logs show that it is being blocked (and therefore attempting to connect!)
when I unblock the ip address logs show nothing, but I cannot ping the router.

ifconfig on router shows:
eth0 Link encap:Ethernet HWaddr 00:E0:63:82B:F2
inet addr:192.168.42.1 Bcast:192.168.42.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15024 errors:0 dropped:0 overruns:0 frame:0
TX packets:12014 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:1657475 (1.5 Mb) TX bytes:6359319 (6.0 Mb)
Interrupt:3 Base address:0x100

eth1 Link encap:Ethernet HWaddr 00:00:21:12:8A:6A
inet addr:192.168.42.2 Bcast:192.168.42.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:662 errors:0 dropped:0 overruns:0 frame:2
TX packets:60 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:60051 (58.6 Kb) TX bytes:3600 (3.5 Kb)
Interrupt:9 Base address:0x300

any ideas as to why I can't access the router on eth1 anyone??

would anymore information help?

finegan??

anyone???

you can't have two NIC's running on the same netmask, it doesn't make sense as far as ethernet protocols go. however convenient it might seem to you ethernet protocols have to be fully scalable and can't be allowed to be broken, so you need to change the subnet, annd then i assume you will want to look at ip masquarading, for which i'd just recommend an app called firestarter to let it sort it all out for you.

cheers chris,

actually had different netmasks before, didn't seem to make much difference..

will give it a whirl but..

better do some reading on ip-masq..

Its not so much that the netmask is the same its the fact that the IP addresses are in the same network. A router routes BETWEEN networks therefore, by definition, can't have two interfaces in the same IP network.

192.168.42.1 mask 255.255.255.0 = IP network 192.168.42.0
192.168.42.2 mask 255.255.255.0 = IP network 192.168.42.0

See? The same network.

Use 192.168.43.0 network on eth1 and it will work. Don't forget to change any other devices on the ethernet connected to eth1 as well!

thanks for replying!

all systems seem to be running ok now, ended up changing netmask to 255.255.255.240 & ip to 192.168.43.0(etc)

now I just gotta figure out why me damn winxp can't access the net through router...

Is that a samba thing? I didn't think I'ld need that coz I'm just trying to access router webpages & internet (via ppp0 not ethernet)